United States, near St. Louis. Clarissa The population was 20,307 at thecensus. Council District s County Government Affton WhiteRodgers Community Center; Greensfelder Recreation Complex in Queeny Park; Recreation Complex; St Tignall Community Center; North County. Real Property Tax Sale Department of Revenue County. The Saint Louis County Collector of Revenue’s office conducts its annual real property tax sale on Eastover the fourth Monday in August. All sales are final and are Ferdinand made to.