The Armstrong School District is a large, public school district which encompasses approximately . The District is one of the 500 public school districts of Pennsylvania. In Armstrong County, Pennsylvania, Armstrong School District covers the Boroughs of Applewold, Atwood, Dayton, Elderton, Ford City, Ford Cliff, Kittanning, Manorville, Rural Valley, West Kittanning and Worthington and the Townships of Bethel Township, Boggs Township, Burrell Township, Cadogan Township, Cowanshannock Township, East Franklin Township, Kittanning Township, Manor Township, North Buffalo Township, Pine Township, Plumcreek Township, Rayburn Township, South Bend Township, Valley Township, Washington Township, Wayne Township and West Franklin Township. In Indiana County, Pennsylvania the district includes the Borough of Smicksburg and West Mahoning Township. According to 2000 federal census data, it served a resident population of 44,970. By 2010, the District's population declined to 43,301 people. In 2009, Armstrong School District residents' per capita income was $15,449, while the median family income was $36,907.