Union County Airport
Daylight today(Sep 3, 2026, local time)
About 13h 0m of daylight. Civil twilight (dawn/dusk) approximates the FAA definition of night for logging and currency. Times are computed and approximate — verify with official sources.
About Union County Airport
Union County Airport is a public use airport in Union County, Ohio, United States. It is owned by the Union County Airport Authority and located one nautical mile (2 km) southeast of the central business district of Marysville, Ohio. This airport is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a general aviation facility.
Summary from Wikipedia, photo via Wikimedia Commons, licensed under CC BY-SA.
Live weather
KMRTNOTAMs
KMRTReference only — not an official briefing. Always obtain a certified briefing (e.g. 1800wxbrief.com / your AIS) before flight.
NOTAM data via the FAA NOTAM system.
Live departures & arrivals
Flight data by AeroDataBox. Times are estimates — not for navigation; confirm with the airline.
Where you can fly from here
Current scheduled routes & daily frequency by AeroDataBox. Approximate — confirm bookable schedules with the airline.
Live traffic nearby
Aircraft currently within ~40 nm, from live ADS-B. Positions are approximately real-time — not for navigation.
Live ADS-B by adsb.lol & the OpenSky Network. Not for navigation.
Map
Runway centrelines, navaids and overlapping airspace. Tiles © OpenStreetMap contributors. Reference only — not for navigation.
Runways (1)
| Runway | Length | Width | Surface | Lighting | Status |
|---|---|---|---|---|---|
| 09 / 27▸ displaced | 4,218 ft / 1,286 m | 75 ft | Asp | Lighted | Open |
Radio frequencies (3)
| Type | Description | Frequency |
|---|---|---|
| A/D | COLUMBUS APP/DEP | 120.200 MHz |
| AWOS | AWOS 3 | 119.275 MHz |
| UNIC | CTAF/UNICOM | 122.800 MHz |
Instrument procedures & charts
Instrument approaches (2)
Takeoff & alternate minimums (2)
Showing 4 of 4 FAA procedures on this overview. Always fly the current, official chart. Full charts page.
Tall obstacles nearby
| Obstacle | Height AGL | Top (MSL) | Lit |
|---|---|---|---|
| Obstacle | — | 978 ft | — |
Tallest obstacles within ~10 nm. Data via OpenAIP. Reference only — consult official charts.
Nearby airports
Great-circle distance and true bearing from Union County Airport.
Frequently asked questions
What is the ICAO code for Union County Airport?
The ICAO code for Union County Airport is KMRT.
Where is Union County Airport located?
Union County Airport is small airport located in Marysville, United States, at an elevation of 1,021 ft (311 m).
How many runways does Union County Airport have?
Union County Airport has 1 runway, the longest being 4,218 ft / 1,286 m.
What time zone is Union County Airport in?
Union County Airport is in the America/New York time zone (UTC-04:00).
What is the magnetic variation at Union County Airport?
The magnetic variation (declination) at Union County Airport is approximately 7° W, per the World Magnetic Model. Variation changes slowly over time — always use the current value charted for navigation.
What airports are near Union County Airport?
The nearest airport to Union County Airport is Fl-Airfield (2OA5), about 2.5 nm to the s, followed by Darby Airport and J-Em Farm Airport.
Is the information on this page suitable for flight planning?
No. Union County Airport data here is for reference and training only — not for navigation. Always consult official sources and current charts before any flight.