Princeton Municipal Airport (IATA: PNN, ICAO: KPNN, FAA LID: PNN) is a town-owned public-use airport located two nautical miles (3.7 km) south of the central business district of Princeton, a town in Washington County, Maine, United States.

[1] Princeton Municipal Airport covers an area of 420 acres (170 ha) at an elevation of 265 feet (81 m) above mean sea level.

It has one runway designated 15/33 with an asphalt surface measuring 4,004 by 100 feet (1,220 x 30 m).

For the 12-month period ending July 31, 2007, the airport had 2,250 aircraft operations, an average of 187 per month: 98% general aviation and 2% air taxi.

At that time there were 9 aircraft based at this airport: 78% single-engine and 22% ultralight.