DeFuniak Springs is a city in and the county seat of Walton County, Florida, United States. The population was 5,919 as of the 2020 Cen…DeFuniak Springs is a city in and the county seat of Walton County, Florida, United States. The population was 5,919 as of the 2020 Census, up from 5,177 at the 2010 census. It is part of the Crestview—Fort Walton Beach—Destin, Florida Metropolitan Statistical Area. DeFuniak Springs also serves as a hub for residents in surrounding unincorporated communities.