Union County
MRT · KMRT · Marysville, Ohio · Union County · map
Union County is a public-use airport owned by Union County Arpt Auth, 1 mile southeast of Marysville, Ohio, 1,021 feet above sea level. It has 2 runways; the longest, 09/27, is 4,218 feet of asphalt. It has fuel (100LL avgas, Jet A-1, Jet A-1 with additive) and about 57 based aircraft. The FAA counts about 32,785 takeoffs and landings a year.
Weather right now KMRT · observed 6:35 pm EDT (22:35 UTC), 19 minutes ago
VFR good flying weather
- Wind variable at 2 knots
- Visibility 10 miles or more
- Temperature 66°F (19°C), dew point 41°F (5°C)
- Altimeter 30.05 inHg
No terminal forecast is issued for this station. The nearest forecast is usually at the closest larger airport.
The codes as issued (METAR and TAF)
METAR KMRT 062235Z AUTO VRB02KT 10SM CLR 19/05 A3005 RMK AO2
From the National Weather Service's aviation weather service, refreshed every few minutes; times are local to the airport with UTC in brackets. For a flight, get your briefing from Flight Service or an approved provider.
The airport
- Codes
- FAA MRT · ICAO KMRT
- Kind
- Airport · open to the public · publicly owned
- Owner
- Union County Arpt Auth
- Elevation
- 1,021 feet above sea level
- Control tower
- No control tower
- Attended
- every day, 8:00 am to 5:00 pm
- Lights
- runway lights see the remarks below; beacon sunset to sunrise
- Fuel
- 100LL avgas, Jet A-1, Jet A-1 with additive
- Repairs
- airframe: major repairs; engine: major repairs
- Parking
- hangar, tiedown
- On the chart
- Detroit sectional
- Magnetic variation
- 5W
- In the FAA's files since
- July 1967
Runways 2
For understanding the field, not for navigation.
| Runway | Length × width | Surface | Lights |
|---|---|---|---|
| 09/27 | 4,218 × 75 ft | Asphalt, fair | Medium-intensity lights |
| 08/26 | 2,522 × 80 ft | Grass, good |
- Runway 09: PAPI, four lights on the left
- Runway 27: PAPI, four lights on the left, threshold displaced 123 ft, rr 20 ft high 425 ft from the end
Radio frequencies
| Common traffic advisory (CTAF) · UNICOM | 123.05 | |
| Approach and departure | 125.95 | |
| Mrt and aWOS-3PT | 126.5 |
Automated weather (AWOS-3PT), by phone 937-553-0033.
Based aircraft as counted for the FAA, fiscal year 2024
Takeoffs and landings a year about 32,785, the FAA's fiscal year 2024 (October 2023 to September 2024)
Local flights stay in the traffic pattern or nearby, often practice; travelling flights arrive from or leave for somewhere else. Counts at airports without a tower are the FAA's estimates.
Wind map live wind over the area, from Windy.com
Colours show wind speed, the moving lines its direction; drag the time bar for the coming days. Map and forecast by Windy.com.
Aircraft registered in Marysville from the FAA register
49 aircraft are registered to owners in Marysville, Ohio: 28 piston singles, 7 drones, 7 balloons, 3 helicopters, 1 piston twin. Not every one of them is based at this airport; the based-aircraft count above is the FAA's figure for this airport alone.
Companies and organisations in town with two or more aircraft:
Individuals are counted, never named. All aircraft registered in Ohio.
Accidents and incidents at or near this airport NTSB records · 11 since 1982, 3 fatal
Cases the NTSB recorded with this as the nearest airport, newest first. Each opens the full report in plain English.
Nearby within 30 nautical miles
The FAA's remarks as written in the airport file
- Activate runway end identifier lights runway 09 and 27; PAPI runway 09 and 27; medium-intensity runway lights runway 09/27 - the common traffic frequency.
- Ramp fee for commercial aircraft.
- Prior cdn required.
- Fuel available H24 self service via credit card.
- CK NOTAMs for sts of aerobatic box south of runway 09/27 and 08/26 - RP runway 27 and 26 when actv.
- Calm wind runway.
- Threshold and edges marked with cones.
- Threshold and edges marked with cones.
- Approach ratio 27:1 to dthr due to +20 feet railroad, 425 feet dist, 260 feet R.
- Deer, birds, and otr wildlife on and in the vicinity of airport.
Facts from the FAA's airport file effective October 1, 2026, written out in plain English; weather from the National Weather Service's aviation weather service; registered aircraft from the FAA register as of October 5, 2026; accidents from the NTSB's public database. Owners are shown only when they are an organisation; no person is named. Check the official sources before a flight: this page is for understanding an airport, not for planning one.