Muhlenberg County Airport (M21), Kentucky
Landing essentials
Whether you can land, whether you can refuel, and how customs works here.
Overview
Muhlenberg County Airport, identified locally as M21, is a public-use general aviation field in Greenville, Kentucky, sitting at 428 feet elevation. The airport handled 627 total annual operations in 2025 per FAA TFMSC data, with business aviation accounting for 277 of those movements. It sits roughly 278 nautical miles from the nearest major metro area, and the closest customs-capable airport is KHOP, about 37 nautical miles away. Several regional airports lie within a 30-nautical-mile radius, including Madisonville Regional and Ohio County.
Runways
Muhlenberg County Airport has one paved runway, 06/24, 4,999 ft long and 75 ft wide, with an asphalt surface.
Source: FAA Form 5010.
Fuel and airfield services
Muhlenberg County Airport has Jet A+ and 100LL available on the field. Fueling is available from 8am to 5pm, daily, and the airport has no control tower.
Source: FAA Form 5010 / NASR.
Customs
Muhlenberg County Airport does not clear customs. The nearest port of entry is Campbell Aaf (fort Campbell) (KHOP), 37 NM away.
Source: CBP list of ports of entry.
Business aviation traffic
Muhlenberg County Airport recorded 277 business aviation movements in 2025. Traffic peaks in July. Business aviation traffic at M21 concentrates in the spring and summer months, with April and July showing the highest activity of the year.
Business jet movements, FAA TFMSC count. Peak month July, 33 movements in 2025.
Source: FAA TFMSC, business jet movements, 2025.
Climate
Weather station is on the field. Some values are estimated by the agency. 1991–2020 climate normals.
Source: NOAA NCEI.
Operating constraints
Muhlenberg County Airport has published operating constraints in three categories: access, runway notes and other notes.
For clearance delivery, contact Campbell Approach.
REIL lighting for runways 06 and 24, PAPI for runways 06 and 24, and MIRL for runway 06/24 are pilot-activated via CTAF.
A 27:1 obstruction clearance slope applies at the displaced threshold.
Fuel is available 24 hours a day using a credit card.
Source: FAA Chart Supplement.
Nearby airfields
Muhlenberg County Airport has five airfields within 31 NM. The closest is Madisonville Regional, 13.93 NM northwest.
Source: Skystar calculation from official coordinates.
Skystar at M21
We arrange catering, fuel and trip support here. Supplier prices reach you unchanged; our coordination fee sits on its own line.
The same order, priced two ways.
$1,200.00 catering order at M21.
Unchanged.
What the kitchen invoices us is what your quote reads.
One line, fixed.
It does not move with the size of the order.
At cost.
Passed on at the exact amount the processor took.
Market practice figures are industry averages, not a specific competitor.
Frequently asked questions
What are the operating hours at Muhlenberg County Airport (M21)?
Muhlenberg County Airport, local identifier M21, has attendance staffed Monday through Friday from 0800 to 1700. Fuel remains available outside those hours through a self-service credit card system, per airport remarks. Pilots operating outside the staffed window should plan for an unattended field and rely on CTAF for runway lighting activation.
What fuel types are available at M21?
M21, Muhlenberg County Airport in Greenville, Kentucky, stocks 100LL and A+ fuel, with Jet A also available on the field. Fuel is accessible H24 via credit card, according to airport remarks, independent of the staffed attendance schedule. This gives operators flexibility for after-hours turnarounds without needing to coordinate arrival timing with airport staff.
Does Muhlenberg County Airport have customs clearance on site?
Muhlenberg County Airport does not have customs service on site. The nearest customs facility is at KHOP, located approximately 37 nautical miles away. Operators requiring customs clearance near M21 should plan to route through KHOP or coordinate clearance arrangements in advance of arrival.
How long is the runway at M21 Muhlenberg County Airport?
M21 has a single asphalt runway, 06/24, measuring 4,999 feet in length and 75 feet in width. This is the only paved surface at Muhlenberg County Airport, and it accommodates the field's business aviation traffic. Approach lighting includes REIL and PAPI on both runway ends, along with medium intensity runway lighting, all activated via CTAF.