Averill Park Central School District (APCSD) is a suburban and rural fringe public school district located east of the city of Rensselaer in south central Rensselaer County, New York. The district has five operating school buildings: three elementary schools, one Middle school, and one high school. The district is a member of the Rensselaer-Columbia-Greene Boards of Cooperative Educational Services (BOCES), known as Questar III.