Sidney is located in Cheyenne County. About 6,410 people live here (as of 2020). Between 2010 and 2020, the population declined from 6,757 to 6,410. The region is at 1246 meters above sea level. The area covers about 19.4 square kilometers. There are about 332 streets in Sidney. The postal codes are 69160–69162. The dialing code is 308. The name originates from Sidney Dillon (American businessman) Sidney is seat of Cheyenne County, Nebraska, United States. Among other things, Sidney has hotels, restaurants, cafés, clothing Stores, attractions, museums, schools, banks, dentists, doctors and pharmacies. More information at
www.cityofsidney.org.