1
Runway
6
Frequencies
6
Procedures
0
NOTAMs
Quick Facts
FAA
4I3
Elevation
1,191.6 ft MSL
Runways
1
Frequencies
6
Tower
No
Fuel
100LL,A+
Coordinates
40.329, -82.526
Airport Information
Facility Type
AIRPORT
Elevation
1,191.6 ft MSL
Control Tower
No
Fuel Types
100LL,A+
Traffic Pattern
808 ft MSL
ARTCC
INDIANAPOLIS
Coordinates
40.3289, -82.5261
Ownership
Public
Hours of Operation
Current Weather
METAR K4I3 220415Z AUTO 04006KT 10SM OVC055 13/09 A3020 RMK AO2
Flight Category
VFR
Wind
40° at 6 kt
Visibility
10+ SM
Temperature
13°C
Dewpoint
9°C
Altimeter
1022.80 inHg
Cloud Cover
OVC
Nearest weather from K4I3 (0 NM away)
Observed 2026-05-22 04:15Z
Runways
| ID | Length | Width | Surface | Lights |
|---|---|---|---|---|
| 10/28 | 5,504 ft | 100 ft | ASPH | MED |
Frequencies
| Type | Frequency | Name |
|---|---|---|
| 4I3 AWOS-3PT | 126.05 | - |
| APCH/P DEP/P IC | 125.95 | JOHN GLENN COLUMBUS INTL |
| APCH/P DEP/P IC | 317.775 | JOHN GLENN COLUMBUS INTL |
| CD/P | XXX.XXX | JOHN GLENN COLUMBUS INTL |
| CTAF | XXX.XXX | KNOX COUNTY |
| UNICOM | XXX.XXX | KNOX COUNTY |
Active NOTAMs
No active NOTAMs for 4I3.
IFR Procedures
3 Approaches, 2 Runway, 1 STARs
Nearby Airports in Ohio
0D7
ADA
ADA — 949 ft
K0D7
Ada Airport
Ada — 949 ft
83OH
Adams Strip
Pleasant Hill — 973 ft
83OH
ADAMS STRIP
PLEASANT HILL — 973 ft
50OH
Aerodrome Les Noyers
Jamestown — 1,085 ft
50OH
AERODROME LES NOYERS
JAMESTOWN — 1,085 ft
55OI
AERO FLIGHT CENTER
EAST PALESTINE — 1,140 ft
55OI
Aero Flight Center Airport
East Palestine — 1,140 ft
Nearest airports
- 0D7 — ADA
ADA
- K0D7 — Ada Airport
Ada
- 83OH — Adams Strip
Pleasant Hill
- 83OH — ADAMS STRIP
PLEASANT HILL
- 50OH — Aerodrome Les Noyers
Jamestown
Ohio airports
4I3 Operational Overview
Location & Facility
KNOX COUNTY (4I3) is a publicly owned airport open to the public located in MOUNT VERNON, Ohio, United States. The field sits at an elevation of 1,191.6 feet above mean sea level (MSL) at coordinates 40.3289°N, 82.5261°W.
Runways
KNOX COUNTY has 1 runway. The longest runway (10/28) measures 5,504 feet by 100 feet with a asph surface.
Communications & Operations
KNOX COUNTY is a non-towered (pilot-controlled) field. A total of 6 communication frequencies are published for this facility.
Services & Fuel
KNOX COUNTY offers 100LL,A+ fuel. Pilots planning fuel stops should confirm availability with the FBO, as hours and pricing may vary.
Instrument Procedures
KNOX COUNTY has 6 published instrument flight procedures, including 3 approaches. These procedures are updated on the 28-day AIRAC cycle. Sign up for AeroCopilot to view full procedure charts with waypoint maps and altitude profiles.
Current Conditions
The current flight category at KNOX COUNTY is VFR (Visual Flight Rules — good flying conditions). Weather conditions are updated in real-time from official NOAA Aviation Weather Center observations.
Frequently Asked Questions
What is 4I3?
4I3 is the ICAO identifier for KNOX COUNTY, a public-use airport located in MOUNT VERNON, Ohio, United States.
How many runways does KNOX COUNTY have?
KNOX COUNTY (4I3) has 1 runway. See the runway table above for dimensions and surface types.
What is the elevation of 4I3?
The field elevation of KNOX COUNTY is 1,191.6 feet above mean sea level (MSL).
Is fuel available at 4I3?
Yes, KNOX COUNTY offers 100LL,A+ fuel.
What are the current weather conditions at 4I3?
The current flight category at KNOX COUNTY is VFR. See the METAR section above for full decoded weather data including wind, visibility, temperature, and altimeter.
Are there active NOTAMs at 4I3?
There are currently no active NOTAMs for KNOX COUNTY.
How do I access complete data for 4I3?
Sign up for a free AeroCopilot account to access all frequencies, full NOTAM text with AI interpretation, decoded forecasts, and IFR procedure charts for KNOX COUNTY.
Where is KNOX COUNTY located?
KNOX COUNTY (4I3) is located in MOUNT VERNON, Ohio, United States, at an elevation of 1,191.6 ft MSL.