The Palmyra Area School District is the public school system in southwest Lebanon County, Pennsylvania. The District serves the residents of Palmyra Borough, North Londonderry Township, South Londonderry Township, Campbelltown, Lawn, and Mount Gretna. This suburban district encompasses approximately 40 square miles (100 km2). According to 2008 local census data, it serves a resident population of 20,487. By 2010, the District's population increased to 22,399 people. In 2009, the Palmyra Area School District residents’ per capita income was $24,082, while the median family income was $58,016. In the Commonwealth, the median family income was $49,501 and the United States median family income was $49,445, in 2010.