About Cornwall, PACornwall is located in Pennsylvania. Cornwall, Pennsylvania has a population of 4,413. Cornwall is less family-centric than the surrounding county with 15% households with children. The county percentage for households with children is 28%. The median household income in Cornwall, Pennsylvania is $77,853. The median household income for the surrounding county is $56,769 compared to the national median of $57,525. The median age of people living in Cornwall is 53.6 years. Cornwall WeatherThe average high temperature in July is 83.2 degrees, with an average low temperature in January of 19.1 degrees. The annual precipitation is 43.69. Cornwall MapCornwall real estate offices
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