McCaslin Airport (FAA LID: O44) is a public use airport located four nautical miles (5 mi, 7 km) north of the central business district of Lexington, a city in Cleveland County, Oklahoma, United States.

[1] McCaslin Airport covers an area of 140 acres (57 ha) at an elevation of 1,135 feet (346 m) above mean sea level.

It has one runway designated 17/35 with a turf surface measuring 2,135 by 80 feet (651 x 24 m).

[1] For the 12-month period ending January 14, 2010, the airport had 600 general aviation aircraft operations, an average of 50 per month.

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