Knox County Airport

4I3 · Mount Vernon, OH · 1,191 ft elevation · var 6W · Non-towered

Overview Weather Runways Comms & NavAids Charts Services & info

Airport information

FAA LID: 4I3
Coordinates: 40.3287, -82.5238
Elevation: 1,191 ft MSL
Magnetic variation: 6W
Sectional chart: DETROIT
Airport use: Public
Control tower: No
Weather station: AWOS-3PT · 126.05 · ☎ 740-397-6297
ARTCC: INDIANAPOLIS (ZID)
Flight service (FSS): CLEVELAND
NOTAM facility: 4I3
Attendance: MON-FRI 0700-1700; SAT-SUN 0900-1700
Beacon: white-green (SS-SR)
Segmented circle: No
Wind indicator: lighted
Distance from city: 4 SW

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	05:27 AM	09:27Z
Sunrise	06:00 AM	10:00Z
Sunset	09:03 PM	01:03Z
Evening civil twilight Loggable night begins	09:37 PM	01:37Z

Loggable night (§1.1)

09:37 PM → 05:27 AM

Night currency (§61.57)

10:03 PM → 05:00 AM

Plan a flight from 4I3

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 10 & 28; MIRL RWY 10/28 - CTAF. PAPI RWY 10 & 28 OPR CONSLY. on 123.05 — Chart Supplement ↗

Runway lighting aids — 10: 4-light PAPI (left) · 28: 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 10 · 104°
Pattern: left (turns left)
TPA: 1,999 ft MSL · 808 AGL
CTAF: 123.05

Enter the left downwind for Rwy 10 at 1,999 ft MSL · 808 AGL on a 45°.

Runway 10/28

5,504 ft × 100 ft · Asphalt (Good)

Edge lights: Med. Weight bearing: Single wheel 55k, Double wheel 100k.

Heading: 104° mag · 98° true
Markings: nonprecision
VGSI: 4-light PAPI (left) (3°)
Traffic pattern: Left
Approach obstacle: Trees, 126 ft, 3,188 ft from threshold, 60 ft L of centerline — 23:1 slope to clear
End lights: REIL

Heading: 284° mag · 278° true
Markings: nonprecision
VGSI: 4-light PAPI (left) (3°)
Traffic pattern: Left
Approach obstacle: Trees, 51 ft, 1,962 ft from threshold, 65 ft L of centerline — 34:1 slope to clear
End lights: REIL

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
10/28	5,504 ft

Communication frequencies

Service	Frequency	Notes
CTAF	123.05	ACTVT REIL RWY 10 & 28; MIRL RWY 10/28 - CTAF. PAPI RWY 10 & 28 OPR CONSLY.
UNICOM	123.05
4I3 AWOS-3PT	126.05
CD/P	119.45
APCH/P DEP/P IC	125.95
APCH/P DEP/P IC	317.775

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

Nearby navigation aids

NavAid	Type	Freq	Radial / Dist magnetic
APE · Appleton	VORTAC	116.70	r021° / 11.1 NM
TVT · Tiverton	VOR-DME	116.50	r250° / 19.7 NM
BUD · Buckeye	VOR	109.80	r130° / 30.1 NM
MFD · Mansfield	VORTAC	108.80	r178° / 32.6 NM
LCK · Rickenbacker	TACAN	134.20	r036° / 36.4 NM
ZZV · Zanesville	VOR-DME	111.40	r315° / 37.2 NM

Chart Supplement FAA A/FD

Open PDF ↗

Preview Chart Supplement

VFR sectional

Open 4I3 on the VFR sectional (SkyVector) ↗

Services

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

Ownership & management

Owner

KNOX CO ARPT AUTHORITY

6481 KINNEY RD, MOUNT VERNON, OH

740-397-9647

Manager

JOSH WYNN

6481 KINNEY RD, MOUNT VERNON, OH

740-397-9647

Remarks FAA

DEER, BIRDS, & OTR WILDLIFE ON & INVOF ARPT.
ACTVT REIL RWY 10 & 28; MIRL RWY 10/28 - CTAF. PAPI RWY 10 & 28 OPR CONSLY.
24 HR PN FOR ATNDNC AFT HRS - CALL AMGR.
KNOXAIRPORT@EMBARQMAIL.COM.
FUEL AVBL H24 SELF SER VIA CREDIT CARD.

Nearby airports

6G4 · Wynkoop Airport (3 NM)6CM · Chapman Memorial Field (10 NM)5OI8 · McKnight AirportPrivate (10 NM)OH09 · One Shot AirportPrivate (13 NM)OH42 · Hawk's Nest AirportPrivate (14 NM)OH56 · Warped Wing AirportPrivate (14 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 4I3 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 4I3

Knox County Airport (4I3) is an airport in Mount Vernon, OH, at 1,191 ft MSL. It has 1 runway, the longest 5,504 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 4I3, refreshed from the Aviation Weather Center and FAA NASR.

Does 4I3 have a control tower?

No. Knox 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 4I3?

Knox County Airport has 1 runway; the longest is 5,504 ft. See the Runways tab for headings, surface, and lighting.

Where is 4I3?

Knox County Airport is in Mount Vernon, OH, at an elevation of 1,191 ft MSL. Coordinates: 40.3287, -82.5238.

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