Le Mars Municipal Airport (IATA: LRJ, ICAO: KLRJ, FAA LID: LRJ) is a city-owned public-use airport located 2 nautical miles (3.7 km; 2.3 mi) southwest of the central business district of Le Mars, a city in Plymouth County, Iowa, United States.

[1] Le Mars Municipal Airport covers an area of 108 acres (44 ha) at an elevation of 1,197 feet (365 m) above mean sea level.

It has one runway designated 18/36 with a concrete surface measuring 4,605 by 75 feet (1,404 x 23 m).

[1] For the 12-month period ending April 17, 2008, the airport had 10,780 aircraft operations, an average of 29 per day: 99.5% general aviation and 0.5% military.

In March 2017, there were 24 aircraft based at this airport: 17 single-engine, 2 jet and 5 ultralight.