1
Runway
0
Frequencies
0
Procedures
0
NOTAMs
Quick Facts
ICAO
23IS
FAA
23IS
Elevation
570 ft MSL
Runways
1
Frequencies
0
Tower
No
Fuel
N/A
Coordinates
40.326, -90.828
Airport Information
Facility Type
AIRPORT
Elevation
570 ft MSL
Control Tower
No
Fuel Types
None listed
Coordinates
40.3257, -90.8276
Current Weather
METAR KMQB 132315Z AUTO 35014G22KT 10SM SCT085 21/02 A3005 RMK AO2 T02140016
Flight Category
VFR
Wind
350° at 14 kt G22
Visibility
10+ SM
Temperature
21.4°C
Dewpoint
1.6°C
Altimeter
1017.70 inHg
Cloud Cover
SCT
Nearest weather from KMQB (16 NM away)
Observed 2026-05-13 23:15Z
Runways
| ID | Length | Width | Surface | Lights |
|---|---|---|---|---|
| E/W | 1,600 ft | 70 ft | TURF | - |
Active NOTAMs
No active NOTAMs for 23IS.
Nearby Airports in Illinois
Nearest airports
- 35IL — 7TH HEAVEN
LA MOILLE
- 35IL — 7th Heaven Airport
La Moille
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SPRINGFIELD
- 70LL — ADAMS NUMBER 1
PONTIAC
- 2LL7 — ADAMS NUMBER 2
PONTIAC
Illinois airports
23IS Operational Overview
Location & Facility
Clark Airport (23IS) is a airport located in Plymouth, Illinois, United States. The field sits at an elevation of 570 feet above mean sea level (MSL) at coordinates 40.3257°N, 90.8276°W.
Runways
Clark Airport has 1 runway. The longest runway (E/W) measures 1,600 feet by 70 feet with a turf surface.
Communications & Operations
Clark Airport is a non-towered (pilot-controlled) field.
Current Conditions
The current flight category at Clark Airport 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 23IS?
23IS is the ICAO identifier for Clark Airport, a public-use airport located in Plymouth, Illinois, United States.
How many runways does Clark Airport have?
Clark Airport (23IS) has 1 runway. See the runway table above for dimensions and surface types.
What is the elevation of 23IS?
The field elevation of Clark Airport is 570 feet above mean sea level (MSL).
Is fuel available at 23IS?
No fuel types are currently listed for Clark Airport. Contact the FBO directly for availability.
What are the current weather conditions at 23IS?
The current flight category at Clark Airport is VFR. See the METAR section above for full decoded weather data including wind, visibility, temperature, and altimeter.
Are there active NOTAMs at 23IS?
There are currently no active NOTAMs for Clark Airport.
How do I access complete data for 23IS?
Sign up for a free AeroCopilot account to access all frequencies, full NOTAM text with AI interpretation, decoded forecasts, and IFR procedure charts for Clark Airport.
Where is Clark Airport located?
Clark Airport (23IS) is located in Plymouth, Illinois, United States, at an elevation of 570 ft MSL.