Harlem Airport (FAA LID: 48S) is a public use airport located three nautical miles (6 km) north of the central business district of Harlem, a city in Blaine County, Montana, United States.

It is owned by the Blaine County and the City of Harlem.

[2] Harlem Airport covers an area of 237 acres (96 ha) at an elevation of 2,643 feet (806 m) above mean sea level.

[1] For the 12-month period ending July 20, 2012, the airport had 3,850 general aviation aircraft operations, an average of 10 per day.

At that time there were five single-engine aircraft based at this airport.