Union County Airport
KMRT has 1 runway. The longest is 9/27 at 4,218 ft × 75 ft (asphalt).
FAA NASR data, cycle 2026-09-03
KMRT field elevation is 1,021 ft MSL. The standard traffic pattern altitude at KMRT is 2,020 ft MSL (1,000 ft AGL). Fuel available at KMRT: 100LL, Jet A-1, Jet A-1+.
FAA NASR data, cycle 2026-09-03
CTAF 123.05 MHz — KMRT is non-towered; self-announce position and intentions on CTAF.
Check KMRT against your personal minimums, plan a route to it, and see the best runway for the current wind — free.
No, KMRT is a non-towered airport. The CTAF frequency is 123.05 MHz.
The AWOS frequency at KMRT (Union County Airport) is 119.275 MHz.
KMRT has 1 runway (9/27). The longest runway is 4,218 feet.
KMRT uses the standard traffic pattern altitude of 1,000 feet AGL — about 2,020 feet MSL at a field elevation of 1,021 feet.
Yes. KMRT (Union County Airport) has 100LL, Jet A-1, Jet A-1+ available. Call the field for hours, self-serve availability and price.
KMRT (Union County Airport) has a field elevation of 1,021 feet MSL.
KMRT (Union County Airport) is located in Marysville, OH.