This page is the City map of California, a state of the United States with streets, paths and places mapped across about 423,970 square kilometres. California was admitted to the Union in 1850 and had 39,538,223 residents in 2020, compared with 37,253,956 in 2010. The state extends from the Pacific coast to the Sierra Nevada and the Mojave and Colorado Deserts, with major rivers including the Sacramento, San Joaquin and Colorado. The regional data divides California into 60 subregions, including counties, the consolidated city and county of San Francisco, Upper Land Park and Simi Hills.
George R. Lawrence (1869-1938), George R. Lawrence Co., Public domain – Wikimedia Commons
San Francisco is a consolidated city and county on the Pacific coast with 873,965 residents and an area of about 600,592,202 square metres. The city stands at an elevation of about 30 metres and was founded in 1776. Its urban area occupies the northern end of the San Francisco Peninsula beside San Francisco Bay.
The Golden Gate Bridge connects San Francisco with Marin County, while the historic cable-car system and Alcatraz Island are internationally recognised landmarks. The city’s street network includes districts such as Chinatown, Mission District and North Beach.
Humboldt County lies in northwestern California along the Pacific Ocean and has 136,463 residents. Its area is about 10,495 square kilometres, including coastal ranges, river valleys and dense redwood forests. The county seat is Eureka, a port city on Humboldt Bay.
The Eel River and Mad River cross the county, while Redwood National and State Parks protect some of the tallest coast redwoods in the world. U.S. Route 101 links Eureka with Arcata and communities along the northern California coast.
Tulare County covers about 12,533 square kilometres in the southern San Joaquin Valley and has 473,117 residents. The county was established in 1852, with Visalia as its county seat. The Kaweah, Tule and Kern river systems drain agricultural parts of the valley.
Sequoia National Park occupies the eastern mountains, including giant sequoia groves and Mount Whitney on the county’s eastern boundary region. Major communities include Visalia, Porterville and Tulare.
Sacramento County had 1,585,055 residents and covers about 2,578 square kilometres. It was established in 1850, and Sacramento is both the county seat and the capital of California. The Sacramento and American rivers meet in downtown Sacramento.
Old Sacramento preserves nineteenth-century buildings beside the riverfront, while the city’s wider urban area includes Elk Grove, Citrus Heights and Rancho Cordova. Interstate 5 and U.S. Route 50 are major transport corridors through the county.
Marin County lies north of San Francisco across the Golden Gate and has 262,321 residents. Its area is about 2,145 square kilometres, extending from San Francisco Bay to the Pacific coast. San Rafael is the county seat, and the county was established in 1850.
Mount Tamalpais rises above Mill Valley and the Marin Headlands, while Point Reyes National Seashore occupies the western peninsula. The Golden Gate Bridge and U.S. Route 101 connect Marin County with San Francisco and the wider Bay Area.
Contra Costa County had 1,165,927 residents and covers about 2,078 square kilometres east of San Francisco Bay. It was established in 1850, with Martinez as the county seat. The county includes the communities of Concord, Richmond, Antioch and Walnut Creek.
The Sacramento and San Joaquin rivers border the county near the Suisun Bay area, while Mount Diablo rises to 1,173 metres. Interstate 680 and State Route 24 cross the county between the East Bay, the Delta and the interior valleys.
Napa County covers about 2,042 square kilometres and had 138,019 residents. The county was established in 1850, with Napa as its county seat on the Napa River. Its valley extends north from San Pablo Bay between the Mayacamas and Vaca ranges.
Napa Valley is internationally known for Cabernet Sauvignon and other wine production, with vineyards around Napa, Yountville, St. Helena and Calistoga. The county’s landscape also includes Lake Berryessa along its eastern boundary.
Nevada County lies in the western Sierra Nevada and has 102,241 residents across about 2,524 square kilometres. It was established in 1851, and Nevada City is the county seat. The Yuba River cuts through the county’s mountainous terrain.
Grass Valley and Nevada City developed during the California Gold Rush and retain historic nineteenth-century buildings. The western foothills connect with Interstate 80 near Truckee and the Lake Tahoe region to the east.
Mariposa County covers about 3,789 square kilometres and had 17,131 residents. It was established in 1850, with Mariposa as the county seat. The county extends from the Sierra Nevada foothills toward Yosemite National Park.
Yosemite Valley, El Capitan and Half Dome are located within Yosemite National Park, whose western access routes pass through Mariposa County. The Merced River flows through Yosemite Valley before descending toward the San Joaquin Valley.
Orange County had 3,186,989 residents and covers about 2,455 square kilometres in Southern California. The county occupies a Pacific coastal plain between Los Angeles County and San Diego County. Its principal cities include Anaheim, Santa Ana, Irvine, Huntington Beach and Newport Beach.
Disneyland Resort is in Anaheim, while the county’s coastline includes Laguna Beach, Dana Point and San Clemente. The Santa Ana River crosses the county from the San Bernardino Mountains to the Pacific Ocean.
San Joaquin County covers about 3,694 square kilometres and had 779,233 residents. It was established in 1850, with Stockton as the county seat and largest city. The San Joaquin River and the Calaveras River cross the county’s agricultural valley.
Stockton lies at the southern edge of the Sacramento–San Joaquin Delta, where waterways connect with the Sacramento River. Tracy, Manteca and Lodi are other major communities linked by Interstate 5 and State Route 99.
Sonoma County covers about 4,580 square kilometres and had 488,863 residents. It was established in 1850, with Santa Rosa as the county seat. The county extends from the Pacific coast and Bodega Bay to the inland Russian River Valley.
Wine regions include the Russian River Valley, Dry Creek Valley and Sonoma Valley, while the Mayacamas Mountains form the eastern boundary. The Russian River flows westward through Healdsburg and Guerneville before reaching the Pacific Ocean.
Lassen County occupies about 12,226 square kilometres in northeastern California and had 32,730 residents. It was established in 1864, with Susanville as the county seat. The county includes parts of the Modoc Plateau, Great Basin and southern Cascade Range.
Lassen Volcanic National Park contains Lassen Peak, an active volcanic dome rising to 3,187 metres. The Susan River flows through Susanville and the Honey Lake Valley before entering Honey Lake.
U.S. Army Corps of Engineers Sacramento District, Public domain – Wikimedia Commons
Calaveras County covers about 2,685 square kilometres in the Sierra Nevada foothills and had 45,292 residents. It was established in 1850, with San Andreas as the county seat. The county includes communities such as Angels Camp, Murphys and Arnold.
Calaveras Big Trees State Park protects giant sequoias near the Stanislaus River. Angels Camp is associated with the annual frog-jumping tradition described in Mark Twain’s 1865 story.
Tuolumne County covers about 5,891 square kilometres and had 55,620 residents. It was established in 1850, with Sonora as the county seat. The county extends from Gold Rush foothills into the central Sierra Nevada.
The Tuolumne River flows through the county toward Don Pedro Reservoir and the San Joaquin Valley. Yosemite National Park includes high-elevation areas east of Sonora, while Columbia State Historic Park preserves a Gold Rush town.
Mono County covers about 8,111 square kilometres along the eastern Sierra Nevada and had 13,195 residents. It was established in 1861, with Bridgeport as the county seat. The county includes the high Owens Valley and the eastern escarpment of the Sierra.
Mono Lake is a saline lake near Lee Vining, while Mammoth Lakes is a major mountain community below the Sierra crest. U.S. Route 395 runs north–south through Bishop, Mammoth Lakes and Bridgeport.
Sierra County lies in the northern Sierra Nevada and had 3,236 residents across about 2,491 square kilometres. It was established in 1852, with Downieville as the county seat. The Yuba River and its tributaries drain the county’s steep mountain valleys.
Communities include Loyalton, Sierraville and Downieville, which developed during the California Gold Rush. The Sierra Valley forms a broad high-elevation basin east of the county’s forested ridges.
Yuba County covers about 1,667 square kilometres and had 81,575 residents. It was established in 1850, with Marysville as the county seat. The Yuba River joins the Feather River near Marysville.
Marysville lies at the northern edge of the Sacramento Valley, while the eastern county reaches the Sierra Nevada foothills. State Route 20 connects Marysville with Grass Valley and Nevada County.
Colusa County covers about 2,995 square kilometres in the Sacramento Valley and had 21,839 residents. It was established in 1850, with Colusa as the county seat. The Sacramento River forms much of the county’s eastern side.
Williams and Colusa are the principal incorporated communities, surrounded by irrigated farmland and rice fields. The foothills of the Inner Coast Range rise west of the valley near Sites Reservoir.
Plumas County covers about 6,769 square kilometres in the northern Sierra Nevada and had 19,790 residents. It was established in 1854, with Quincy as the county seat. The Feather River has its headwaters in the county and forms several major canyon systems.
Lake Almanor lies near the southern Cascade Range, while the Pacific Crest Trail crosses the eastern mountains. Portola, Chester and Greenville are among the county’s recognised communities.
Sutter County covers about 1,576 square kilometres and had 99,633 residents. It was established in 1850, with Yuba City as the county seat. The Feather River borders the county before joining the Sacramento River.
Sutter Buttes rise from the Sacramento Valley west of Yuba City and are often described as the world’s smallest mountain range. Agriculture, including orchards and rice cultivation, occupies much of the flat valley floor.
Los Angeles County had 10,014,009 residents and covers about 12,308 square kilometres. It was established in 1850, and Los Angeles is the county seat and the largest city in California. The county stretches from the Pacific Ocean and Santa Monica Bay to the San Gabriel and Santa Monica Mountains.
Hollywood, the Port of Los Angeles, Griffith Observatory and the Getty Center are prominent places within the county. The Los Angeles River runs through the metropolitan area, while Interstate 5, U.S. Route 101 and Interstate 10 cross the urban basin.
Kings County had 150,965 residents in the supplied regional data. It lies in the southern San Joaquin Valley, with Hanford as the county seat and Lemoore and Corcoran among its other communities. The county’s flat agricultural land is connected by State Route 198 and State Route 43.
The Kings River enters the valley from the Sierra Nevada and supports farmland around Hanford. Naval Air Station Lemoore occupies a large area west of the city of Lemoore.
El Dorado County covers about 4,631 square kilometres and had 191,185 residents. It was established in 1850, with Placerville as the county seat. The county extends from the western foothills to Lake Tahoe and the Sierra Nevada crest.
Coloma is the site where gold was discovered at Sutter’s Mill in 1848, an event that began the California Gold Rush. The American River flows west through the county toward Sacramento.
San Diego County covers about 11,721 square kilometres and had 3,298,634 residents. It was established in 1850 and includes San Diego, the county seat, as well as Oceanside, Escondido and Chula Vista. The county reaches from the Pacific coast to the Laguna Mountains and the Mexican border.
San Diego Bay, Torrey Pines and the coastal cities define the western part of the county, while Anza-Borrego Desert State Park occupies the east. The San Diego River and Sweetwater River cross the metropolitan region.
Siskiyou County covers about 16,440 square kilometres in northern California and had 44,076 residents. It was established in 1852, with Yreka as the county seat. The county includes Mount Shasta, the Klamath Mountains and part of the Cascade Range.
Mount Shasta rises to 4,322 metres and dominates the landscape near the city of Mount Shasta. The Klamath River flows west through Siskiyou County toward the Pacific Ocean.
Trinity County lies in northwestern California and had 16,112 residents across about 8,307 square kilometres. It was established in 1850, with Weaverville as the county seat. The county consists largely of forested Klamath and Coast Range mountains.
Trinity Lake is a large reservoir on the Trinity River near Weaverville and Lewiston. The Trinity River flows westward to join the Klamath River near Willow Creek in Humboldt County.
Monterey County covers about 9,767 square kilometres and had 439,035 residents. It was established in 1850, with Salinas as the county seat. The county extends from Monterey Bay and Big Sur to the inland Salinas Valley.
Point Lobos, Big Sur and the Monterey Bay coastline are major geographic landmarks, while the Salinas River runs north toward Monterey Bay. Cannery Row in Monterey is associated with the city’s former sardine-canning industry and John Steinbeck’s writing.
Tehama County covers about 7,672 square kilometres and had 65,829 residents. It was established in 1856, with Red Bluff as the county seat. The county extends across the northern Sacramento Valley toward the southern Cascade Range.
The Sacramento River flows through Red Bluff and the western valley, while Lassen Volcanic National Park lies northeast of the county. Corning and Red Bluff are connected by Interstate 5.
Madera County covers about 5,577 square kilometres and had 156,255 residents. It was established in 1893, with Madera as the county seat. The county stretches from the San Joaquin Valley into the Sierra Nevada.
The San Joaquin River forms part of the county’s northern boundary, and Bass Lake lies in the Sierra foothills. Yosemite National Park is accessible from the county through routes serving Oakhurst and the southern Sierra.
Mendocino County lies on the northern California coast, but no population or area figure is supplied in the regional data. Its county seat is Ukiah, in the inland Russian River Valley. The Pacific Ocean borders the county west of the Coast Range.
The Navarro, Noyo and Russian rivers reach the coast within or near the county, while Mendocino Headlands State Park surrounds the village of Mendocino. Coastal redwood forests occur north of the Russian River valley.
Amador County covers about 1,566 square kilometres and had 40,474 residents. It was established in 1854, with Jackson as the county seat. The county lies in the Sierra Nevada foothills between Sacramento County and Alpine County.
Jackson, Sutter Creek and Volcano preserve buildings associated with the California Gold Rush. The Mokelumne River forms much of the northern boundary and feeds Pardee Reservoir.
Inyo County had 18,260 residents in the supplied data and occupies the eastern Sierra Nevada and northern Mojave Desert. The county seat is Independence, while Bishop is its largest community. The Owens River runs through the Owens Valley between the Sierra Nevada and White Mountains.
Mount Whitney, at 4,421 metres, is the highest point in the contiguous United States and rises on the county’s western side. Death Valley National Park occupies part of the eastern and southeastern county region.
Fresno County covers about 15,585 square kilometres and had 1,008,654 residents. It was established in 1856, with Fresno as the county seat and largest city. The county extends from the San Joaquin Valley to the Sierra Nevada.
Kings Canyon and parts of Sequoia National Park lie in the eastern mountains, while the Kings and San Joaquin rivers cross the valley. Fresno, Clovis and Reedley form major urban and agricultural centres.
Glenn County covers about 3,437 square kilometres and had 28,917 residents. It was established in 1891, with Willows as the county seat. The county lies on the western side of the Sacramento Valley.
The Sacramento River forms the eastern boundary, and the Stony Creek watershed drains the western foothills. Orland and Willows are connected by Interstate 5 and State Route 32.
Pacific Southwest Region USFWS from Sacramento, US, Public domain – Wikimedia Commons
Kern County covers about 21,138 square kilometres and had 909,235 residents. It was established in 1866, with Bakersfield as the county seat. The county extends from the southern San Joaquin Valley across the Tehachapi Mountains into the Mojave Desert.
The Kern River reaches Bakersfield from the Sierra Nevada, while the county is a major centre of oil extraction and irrigated agriculture. Edwards Air Force Base occupies desert terrain in the northern part of Kern County.
Riverside County covers about 18,915 square kilometres and had 2,418,185 residents. It was established in 1893, with Riverside as the county seat. The county stretches from the Inland Empire to the Coachella and Palo Verde valleys.
Joshua Tree National Park occupies the eastern desert, while Palm Springs lies below the San Jacinto Mountains. The Santa Ana River begins in the San Bernardino Mountains and crosses the western part of the county.
San Luis Obispo County covers about 9,364 square kilometres and had 282,424 residents. It was established in 1850, with San Luis Obispo as the county seat. The county extends along the Pacific coast from Morro Bay to the Santa Maria area.
Hearst Castle is located at San Simeon, while Morro Rock rises beside Morro Bay. The Salinas River begins in the county’s inland hills and flows north toward Monterey Bay.
Alpine County had 1,204 residents and covers about 1,925 square kilometres in the Sierra Nevada. It was established in 1864, with Markleeville as the county seat. The county borders Nevada and includes high mountain valleys near Ebbetts Pass.
Lake Alpine and parts of the Mokelumne Wilderness lie within the county’s mountain landscape. The Carson River rises near Markleeville and flows east toward Nevada.
San Mateo County covers about 1,919 square kilometres and had 764,442 residents. It was established in 1856, with Redwood City as the county seat. The county occupies the central and southern San Francisco Peninsula between San Francisco Bay and the Pacific Ocean.
Half Moon Bay, Pacifica and Daly City lie along the coast, while Silicon Valley communities extend south toward Santa Clara County. San Mateo Creek and the San Francisquito Creek drain the peninsula’s eastern slopes.
Alameda County covers about 2,127 square kilometres and had 1,682,353 residents. It was established in 1853, with Oakland as the county seat. The county includes Berkeley, Fremont, Hayward, Livermore and the eastern shore of San Francisco Bay.
The Alameda Creek watershed reaches the bay near Fremont, while the Livermore Valley lies between the Diablo Range and Coast Range foothills. The Bay Area Rapid Transit system connects Oakland with Berkeley, Fremont and other regional cities.
San Benito County covers about 3,206 square kilometres and had 64,209 residents. It was established in 1850, with Hollister as the county seat. The county lies southeast of the Santa Clara Valley and includes the northern Gabilan Range.
The San Benito River flows through Hollister toward the Pajaro River, while Pinnacles National Park protects volcanic rock formations in the eastern county. State Route 25 connects Hollister with the park and the central Coast Range.
Santa Clara County covers about 3,377 square kilometres and had 1,936,259 residents. It was established in 1850, with San Jose as the county seat and largest city. The county contains most of Silicon Valley between San Francisco Bay and the Santa Cruz Mountains.
Apple, Google and other technology companies have major campuses in cities including Cupertino, Mountain View and Sunnyvale. The Guadalupe River flows through San Jose, while the Santa Clara Valley is enclosed by the Diablo and Santa Cruz ranges.
Lake County covers about 3,443 square kilometres and had 68,163 residents. It was established in 1861, with Lakeport as the county seat. The county is centred on Clear Lake, California’s largest natural freshwater lake.
The Russian River begins in the Mendocino Range west of Clear Lake and flows toward Sonoma County. Mount Konocti rises on the southern shore of Clear Lake, near the communities of Clearlake and Kelseyville.
Del Norte County covers about 3,185 square kilometres and had 27,743 residents. It was established in 1857, with Crescent City as the county seat. The county occupies California’s far northwestern corner beside the Pacific Ocean and Oregon.
Redwood National and State Parks protect ancient coast redwoods and river valleys, including the Smith River watershed. The Smith River reaches the ocean north of Crescent City, while U.S. Route 101 follows the coast.
Merced County had 268,455 residents in the supplied data and lies in the central San Joaquin Valley. Merced is the county seat, while Los Banos and Atwater are other major communities. The county’s agricultural plain is crossed by the Merced River and Bear Creek.
The Merced River descends from Yosemite National Park before entering the valley near the city of Merced. Interstate 5 runs along the western county, and State Route 99 connects Merced with Fresno and Stockton.
Ventura County covers about 5,719 square kilometres and had 843,843 residents. It was established in 1873, with Ventura as the county seat. The county extends from the Pacific coast and Channel Islands to the Santa Clara River valley and Simi Hills.
Oxnard, Thousand Oaks, Simi Valley and Camarillo are major communities, while the Santa Clara River flows west through the county. The Channel Islands National Park lies offshore west of Ventura County.
Modoc County covers about 10,887 square kilometres and had 8,700 residents. It was established in 1874, with Alturas as the county seat. The county lies in the northeastern corner of California across the Modoc Plateau.
The Warner Mountains rise east of the Surprise Valley, while the Pit River drains much of the county toward the Sacramento Valley. Lava Beds National Monument occupies volcanic terrain near the northern border.
Yolo County covers about 2,649 square kilometres and had 216,403 residents. It was established in 1850, with Woodland as the county seat. The county lies west of Sacramento between the Sacramento River and the Coast Range foothills.
Davis is known for the University of California, Davis, while West Sacramento lies across the river from Sacramento. Putah Creek crosses the southern county, and the Yolo Bypass carries Sacramento River floodwater.
Butte County covers about 4,344 square kilometres and had 211,632 residents. It was established in 1850, with Oroville as the county seat. Chico is the largest city, located where the Sacramento Valley meets the Sierra foothills.
The Feather River flows through Oroville and is impounded by Lake Oroville, one of California’s major reservoirs. Bidwell Park in Chico extends into the foothills, while the Sierra Nevada rises east of the county.
San Bernardino County covers about 52,073 square kilometres and had 2,181,654 residents. It was established in 1853 and is the largest county by area in the contiguous United States. The county extends from the San Bernardino Mountains across the Mojave Desert to the Nevada and Arizona borders.
San Bernardino, Ontario, Victorville and Barstow are major cities, while Joshua Tree National Park occupies the southern desert. The Mojave River runs intermittently through the High Desert, and Interstate 15 crosses the county toward Las Vegas.
Santa Barbara County lies on the central California coast, but no population or area figure is supplied in the regional data. Santa Barbara is the county seat, and other major communities include Santa Maria, Lompoc and Goleta. The county extends from the Pacific coast to the Santa Ynez Mountains.
The Santa Ynez River flows west through the county, while the Channel Islands lie offshore to the south. The Santa Barbara Mission and the coastal city’s Spanish Colonial Revival architecture are prominent cultural features.
Placer County covers about 3,892 square kilometres and had 404,739 residents. It was established in 1851, with Auburn as the county seat. The county stretches from the Sacramento Valley through the Sierra Nevada to Lake Tahoe.
Roseville and Rocklin form major suburban centres west of the foothills, while the North Fork American River cuts through the canyon near Auburn. Olympic Valley and parts of the Lake Tahoe basin lie in the eastern county.
Shasta County covers about 9,956 square kilometres and had 182,155 residents. It was established in 1850, with Redding as the county seat. The county includes the Sacramento River valley and the southern Cascade Range.
Shasta Lake is formed by Shasta Dam on the Sacramento River north of Redding. Lassen Volcanic National Park lies southeast of the county, while Mount Shasta rises farther north beyond the county boundary.
Solano County covers about 2,348 square kilometres and had 453,491 residents. It was established in 1850, with Fairfield as the county seat. The county lies between San Pablo Bay, Suisun Bay and the Sacramento–San Joaquin Delta.
Vallejo, Benicia, Vacaville and Fairfield are major communities, while the Sacramento River forms the northeastern boundary. Interstate 80 links Solano County with Sacramento and the San Francisco Bay Area.
Stanislaus County covers about 3,923 square kilometres and had 552,878 residents. It was established in 1854, with Modesto as the county seat. The county occupies a central section of the San Joaquin Valley.
The Tuolumne and Stanislaus rivers flow west from the Sierra Nevada through agricultural land. Modesto, Turlock and Ceres are major cities connected by State Route 99.
Imperial County covers about 11,608 square kilometres and had 179,702 residents. It was established in 1907, with El Centro as the county seat. The county occupies the Imperial Valley and desert areas beside Mexico and Arizona.
The Colorado River forms the eastern boundary, while the Salton Sea lies north of El Centro. Irrigated agriculture depends heavily on the All-American Canal, which carries Colorado River water into the Imperial Valley.
Santa Cruz County covers about 1,573 square kilometres and had 270,861 residents. It was established in 1850, with Santa Cruz as the county seat. The county occupies the northern Monterey Bay coast and the western Santa Cruz Mountains.
Natural Bridges State Beach and the redwood forests of Henry Cowell Redwoods State Park are notable landscapes. The San Lorenzo River reaches Monterey Bay at Santa Cruz, while Watsonville lies in the agricultural Pajaro Valley.
Upper Land Park is an administrative subregion at level 10 within Sacramento, California. It lies south of downtown Sacramento near the Sacramento River and the Land Park district. The area is connected to central Sacramento by streets including Broadway and Riverside Boulevard.
Nearby landmarks include William Land Park, the Sacramento Zoo and the Sacramento River Parkway. The neighbourhood’s urban street map links residential blocks with parks, schools and routes toward downtown Sacramento.
Simi Hills is an administrative subregion at level 8 in Southern California. The hills lie between the San Fernando Valley and Simi Valley, mainly within Los Angeles and Ventura County landscapes. Simi Valley and Thousand Oaks are the principal nearby urban areas.
The hills form part of the Transverse Ranges and connect with the Santa Susana Mountains. Roads including State Route 118 cross the area between Los Angeles County and Ventura County.
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