Union County Airport

MRT · KMRT · Marysville, OH · 1,021 ft elevation · var 5W · Non-towered

Overview Weather Runways Comms & NavAids Charts Services & info

Airport information

ICAO / IATA: KMRT
Coordinates: 40.2247, -83.3516
Elevation: 1,021 ft MSL
Magnetic variation: 5W
Sectional chart: DETROIT
Airport use: Public
Control tower: No
Weather station: AWOS-3PT · 126.5 · ☎ 937-553-0033
ARTCC: INDIANAPOLIS (ZID)
Flight service (FSS): DAYTON
NOTAM facility: MRT
Attendance: ALL 0800-1700
Beacon: white-green (SS-SR)
Segmented circle: No
Wind indicator: lighted
Activated: 1967/07
Distance from city: 1 SE

Weather

METAR observed

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TAF forecast

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Sun & FAA night 2026-06-21

Event	Local (EDT)	UTC
Morning civil twilight Loggable night ends	05:31 AM	09:31Z
Sunrise	06:04 AM	10:04Z
Sunset	09:06 PM	01:06Z
Evening civil twilight Loggable night begins	09:39 PM	01:39Z

Loggable night (§1.1)

09:39 PM → 05:31 AM

Night currency (§61.57)

10:06 PM → 05:04 AM

Plan a flight from KMRT

Destination (ICAO)

TAS (kt)Burn (gph)Reserve (hr)Wind from (°)Wind (kt)

Night operations

Airport lighting: SEE RMK
Rotating beacon: white-green · SS-SR
Pilot-controlled lighting: ACTVT REIL RWY 09 & 27; PAPI RWY 09 & 27; MIRL RWY 09/27 - CTAF. on 123.05 — Chart Supplement ↗

Runway lighting aids — 09: 4-light PAPI (left) · 27: 4-light PAPI (left).

FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are in the live weather panel above.

Traffic pattern

Landing runway

LEFT traffic

Landing: Rwy 09 · 088°
Pattern: left (turns left)
TPA: 2,000 ft MSL (≈1,000 AGL)
CTAF: 123.05

Enter the left downwind for Rwy 09 at 2,000 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).

Runway 09/27

4,218 ft × 75 ft · Asphalt (Fair)

Edge lights: Med. Weight bearing: Single wheel 17k.

Heading: 088° mag · 83° true
Markings: nonprecision
VGSI: 4-light PAPI (left) (3°)
Traffic pattern: Left
End lights: REIL

Heading: 268° mag · 263° true
Markings: nonprecision
VGSI: 4-light PAPI (left) (3°)
Traffic pattern: Left
Approach obstacle: Rr, 20 ft, 425 ft from threshold, 260 ft R of centerline — 11:1 slope to clear · penetrates the 20:1 visual approach surface
End lights: REIL
Displaced threshold: 123 ft

Will it fit? Your aircraft's required runway length (from the POH) — checked against every runway here

ft · ≥1.5× comfortable, under 1.25× tight · saved across airports

Runway	Length	Your margin
09/27	4,218 ft

Communication frequencies

Service	Frequency	Notes
APCH/P DEP/P IC	125.95
APCH/P DEP/P IC	317.775
CTAF	123.05	ACTVT REIL RWY 09 & 27; PAPI RWY 09 & 27; MIRL RWY 09/27 - CTAF.
UNICOM	123.05
MRT AWOS-3PT	126.5

Source: FAA NASR (current 28-day cycle).

Nearby navigation aids

NavAid	Type	Freq	Radial / Dist magnetic
BUD · Buckeye	VOR	109.80	r214° / 27 NM
LCK · Rickenbacker	TACAN	134.20	r327° / 31.7 NM
ROD · Rosewood	VORTAC	117.50	r102° / 31.9 NM
XSF · Springfield	TACAN	133.80	r048° / 32.3 NM
SGH · Springfield	VOR-DME	113.20	r048° / 32.5 NM
APE · Appleton	VORTAC	116.70	r283° / 35.3 NM

Procedures at a glance

Lowest mins: RNAV (GPS) · vertical guidance Takeoff mins / ODP ↗ Non-std alternate mins ↗

Approaches2

Minimums & Hot Spots

Chart Supplement FAA A/FD

Open PDF ↗

Preview Chart Supplement

VFR sectional

Open KMRT on the VFR sectional (SkyVector) ↗

Services

Fuel available: 100LL, Jet A-1, Jet A-1 (additive)
Bottled oxygen: NONE
Bulk oxygen: NONE
Airframe service: MAJOR
Powerplant service: MAJOR
Parking: tiedowns, hangars
Other services: Instruction, Rental

Ownership & management

Owner

UNION COUNTY ARPT AUTH

COUNTY COURTHOUSE, 215 W 5TH ST, MARYSVILLE, OH

937-644-2055

Manager

DAVID HOLDEN

760 CLYMER RD, MARYSVILLE, OH

937-644-2055

Remarks FAA

DEER, BIRDS, & OTR WILDLIFE ON & INVOF ARPT.
FOR CD CTC COLUMBUS APCH AT 614-338-8537.
ACTVT REIL RWY 09 & 27; PAPI RWY 09 & 27; MIRL RWY 09/27 - CTAF.
RAMP FEE FOR COML ACFT.
PRIOR CDN RQRD.
SKYVISTAAVIATION@GMAIL.COM.
AFT HRS & EMERG 937-741-3120.
FUEL AVBL H24 SELF SVC VIA CREDIT CARD.
CK NOTAMS FOR STS OF AEROBATIC BOX SOUTH OF RWY 09/27 & 08/26 - RP RWY 27 & 26 WHEN ACTV.
CALM WIND RWY.
THR & EDGES MKD WITH CONES.
THR & EDGES MKD WITH CONES.
APCH RATIO 27:1 TO DTHR DUE TO +20 FT RR, 425 FT DIST, 260 FT R.

Nearby airports

2OA5 · Fl-AirfieldPrivate (3 NM)OH93 · Darby AirportPrivate (5 NM)82OI · J-Em Farm Airport (6 NM)OA51 · Fighter Field Airport (6 NM)6OI5 · Mitchell Airport (8 NM)33OH · Sunset Strip (8 NM)

Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open KMRT in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.

About KMRT

Union County Airport (MRT · KMRT) is an airport in Marysville, OH, at 1,021 ft MSL. It has 1 runway, the longest 4,218 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for KMRT, refreshed from the Aviation Weather Center and FAA NASR.

Does KMRT have a control tower?

No. Union County Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.

What is the longest runway at KMRT?

Union County Airport has 1 runway; the longest is 4,218 ft. See the Runways tab for headings, surface, and lighting.

Where is KMRT?

Union County Airport is in Marysville, OH, at an elevation of 1,021 ft MSL. Coordinates: 40.2247, -83.3516.

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