Reference only — not for real-world navigation.
KM21
Muhlenberg County Airport · Greenville
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS DATA NOT IN DATABASE
Field Elevation
422 ft / 129 m
Transition Altitude
18,000 ft
Primary Channel
AWOS 120.38 MHz (AWOS 3)
Live Conversion
inHg
hPa
Runway Summary (Quick-Links)
05/23 · 5,000 ft · AsphaltLIGHTEDFlight Planning
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Welcome to the technical flight briefing for Muhlenberg County Airport (KM21), located in Greenville, United States. As a vital hub for Microsoft Flight Simulator 2024, MSFS 2020, and X-Plane pilots, this facility features 1 active runway with a maximum elevation of 422 ft. Please note that this field primarily supports VFR and visual approach procedures.Reference the data below for primary communication channels and detailed runway characteristics. Pilots should observe a Transition Altitude of 18,000 ft verified for this field for altimeter reset procedures.
Full Name
Muhlenberg County Airport
ICAO / IATA
KM21 / —
Municipality
Greenville
Country
Region
US-KY — Kentucky
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
422 ft
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 05 / 23
LIGHTED
Runway Length: 5,000 ft / 1,524 m
Runway Width: 75 ft / 23 m
Surface Type: Asphalt
Heading: 55.8° / 235.8°
Runway Width: 75 ft / 23 m
Surface Type: Asphalt
Heading: 55.8° / 235.8°
RWY 05 (55.8°)
No ILS / Visual Only
RWY 23 (235.8°)
No ILS / Visual Only
A/D EVANSVILLE APP/DEP
126.40 MHz
AWOS AWOS 3
120.38 MHz
UNIC CTAF/UNICOM
123.00 MHz
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: AIP 2026 Researched · Cycle: Jan 2026