Caldwell is located in Sumner County. About 1,025 people live here (as of 2020). Between 2010 and 2020, the population declined from 1,068 to 1,025. The region is at 348 meters above sea level. The area covers about 2.8 square kilometers. There are about 75 streets in Caldwell. The postal codes are 67022. The dialing code is 620. Caldwell is city in Sumner County, Kansas, United States. Among other things, Caldwell has hotels, restaurants, supermarkets, museums, schools, banks, hairdressers, dentists and pharmacies. More information at
www.cityofcaldwellks.com.