Knox County
4I3 · Mount Vernon, Ohio · Knox County · map
Knox County is a public-use airport owned by Knox CO Arpt Authority, 4 miles southwest of Mount Vernon, Ohio, 1,192 feet above sea level. Its one runway, 10/28, is 5,504 feet of asphalt. It has fuel (100LL avgas, Jet A with additive).
The airport
- Codes
- FAA 4I3
- Kind
- Airport · open to the public · publicly owned
- Owner
- Knox CO Arpt Authority
- Elevation
- 1,192 feet above sea level
- Pattern altitude
- 808 feet above the airport
- Control tower
- No control tower
- Attended
- Monday to Friday, 7:00 am to 5:00 pm; weekends, 9:00 am to 5:00 pm
- Lights
- runway lights see the remarks below; beacon sunset to sunrise
- Fuel
- 100LL avgas, Jet A with additive
- Repairs
- airframe: major repairs; engine: major repairs
- Parking
- hangar, tiedown
- On the chart
- Detroit sectional
- Magnetic variation
- 6W
Runway
Drawn to scale from the FAA's runway positions, north up. Not for navigation.
| Runway | Length × width | Surface | Lights |
|---|---|---|---|
| 10/28 | 5,504 × 100 ft | Asphalt, good | Medium-intensity lights |
- Runway 10: PAPI, four lights on the left, trees 126 ft high 3,188 ft from the end
- Runway 28: PAPI, four lights on the left, trees 51 ft high 1,962 ft from the end
Radio frequencies
| Common traffic advisory (CTAF) · UNICOM | 123.05 | |
| Clearance delivery | 119.45 | |
| Approach and departure | 125.95 | |
| 4I3 AWOS-3PT | 126.05 |
Automated weather (AWOS-3PT), by phone 740-397-6297.
Wind map live wind over the area, from Windy.com
Colours show wind speed, the moving lines its direction; drag the time bar for the coming days. Map and forecast by Windy.com.
Aircraft registered in Mount Vernon from the FAA register
23 aircraft are registered to owners in Mount Vernon, Ohio: 20 piston singles, 2 drones, 1 business jet. Not every one of them is based at this airport; the based-aircraft count above is the FAA's figure for this airport alone.
Companies and organisations in town with two or more aircraft:
Individuals are counted, never named. All aircraft registered in Ohio.
Accidents and incidents at or near this airport NTSB records · 7 since 1982, 0 fatal
Cases the NTSB recorded with this as the nearest airport, newest first. Each opens the full report in plain English.
Nearby within 30 nautical miles
The FAA's remarks as written in the airport file
- Deer, birds, and otr wildlife on and in the vicinity of airport.
- Activate runway end identifier lights runway 10 and 28; medium-intensity runway lights runway 10/28 - the common traffic frequency. PAPI runway 10 and 28 operates continuously.
- Fuel available H24 self ser via credit card.
Facts from the FAA's airport file effective October 1, 2026, written out in plain English; weather from the National Weather Service's aviation weather service; registered aircraft from the FAA register as of October 5, 2026; accidents from the NTSB's public database. Owners are shown only when they are an organisation; no person is named. Check the official sources before a flight: this page is for understanding an airport, not for planning one.