The Main Street Music Hall in Osage Beach, Camden County, Missouri, USA. – Ben Jacobson ( Kranar Drogin ), CC BY 2.5 – Wikimedia Commons Osage Beach is located in Missouri. The region is located on the body of water Lake of the Ozarks. About 4,637 people live here (as of 2020). Between 2010 and 2020, the population grew from 4,351 to 4,637. The region is at 262 meters above sea level. The area covers about 26.8 square kilometers. There are about 603 streets in Osage Beach. The region was founded in 1886. The postal codes are 65065. The dialing code is 573. Osage Beach is city in Camden and Miller counties in Missouri, United States. Among other things, Osage Beach has hotels, restaurants, supermarkets, shopping Centers, clothing Stores, banks, hairdressers and pharmacies. More information at www.osagebeach-mo.gov.