Marysville, Ohio
KMRT Union County
Union County (KMRT) is a non-towered, public-use airport in Marysville, Ohio, at 1,020.7 ft MSL. It has 2 runways: 08/26 (2,522 by 80 ft, turf), 09/27 (4,218 by 75 ft, asphalt). CTAF 123.05.
FAA NASR data effective Oct 29, 2026. Not for navigation; verify with current FAA charts and the Chart Supplement.
Airport
At a glance
- Identifiers
- ICAO KMRT, FAA MRT
- Location
- Marysville, Ohio (Union County). 1 NM SE of the city center
- Elevation
- 1,020.7 ft MSL
- Position
- 40.2245° N, 83.3517° W
- Control tower
- No, non-towered
- Sectional chart
- Detroit
- Magnetic variation
- 5° W (1985)
- Fuel
- 100LL, Jet A-1, Jet A-1+
- Ownership
- Publicly owned, open to the public
- Attendance
- Daily 0800-1700
2 runways
Runways
| Runway | Length × width | Surface | Edge lights |
|---|---|---|---|
| 08/26 | 2,522 × 80 ft | Turf, good condition | Not listed |
| 09/27 | 4,218 × 75 ft | Asphalt, fair condition | Medium intensity |
Runway ends and traffic pattern
| End | Pattern | Glide slope lights | Instrument | Displaced threshold | Landing distance |
|---|---|---|---|---|---|
| 08 | Not stated | None listed | None listed | None listed | Not listed |
| 26 | Not stated | None listed | None listed | None listed | Not listed |
| 09 | Left traffic | 4-light PAPI, left | None listed | None listed | Not listed |
| 27 | Left traffic | 4-light PAPI, left | None listed | 123 ft | Not listed |
VHF
Frequencies
- CTAF
- 123.05
- Actvt Reil Rwy 09 & 27; Papi Rwy 09 & 27; Mirl Rwy 09/27 - Ctaf.
- UNICOM
- 123.05
- Approach / departure
- 125.95
- "Columbus"
Weather station
- AWOS-3PT MRT
- 126.5
Before you go
Brief KMRT in Ascent EFB.
Current weather, NOTAMs and the airport diagram for Union County, in the app on iPhone and iPad.
Not for navigation. Verify with current FAA charts and the Chart Supplement before flight.
Source: FAA NASR 28-day subscription, cycle effective Oct 29, 2026. Airport data changes every 28 days and NOTAMs can override it at any time.