Avon Park is a city in Highlands County, Florida, United States. As of the 2020 census, the population was 9,658, up from 8,836 at the 2010 census but down from the 2018 estimated population of 10,695. It is part of the Sebring, Florida Metropolitan Statistical Area. It is the oldest city in Highlands County, and was named after Stratford-upon-Avon, England.