Historic Main Street in Circleville, Ohio – Analogue Kid ( talk ), CC BY-SA 3.0 – Wikimedia Commons Circleville is located in Pickaway County. About 13,927 people live here (as of 2020). Between 2010 and 2020, the population grew from 13,314 to 13,927. The region is at 212 meters above sea level. The area covers about 17.5 square kilometers. There are about 413 streets in Circleville. The region was founded in 1810. The postal codes are 43113. Circleville is city in Pickaway County, Ohio, United States. Among other things, Circleville has hotels, restaurants, cafés, supermarkets, clothing Stores, schools and banks. More information at circlevilleoh.gov.