Grand Lake St Marys (O12)

Seaplane base information: St Marys, OH, United States. Search for another airport below.

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Location and general information

Facility type: Seaplane base
FAA identifier: O12
FAA site number: 18468.82*C
City / state: St Marys, OH
County: Auglaize
Time zone: America/New_York
Reference point: 40°32'27.67" N
84°29'26.43" W
Elevation: 871 ft (estimated)
Status: Operational
Ownership: Public, Ohio Div of Parks & Rec
Use: Open to the public
Airport area: 643 acres
From downtown: 5 NM west
Sectional chart: Detroit
Activated: 04/1995

Services and facilities

Control tower: No
Attendance: Apr-nov, all days, 0800-1700
Fuel: 100LL
ARTCC: Indianapolis (ZID)
Flight service: Dayton (DAY)
1-800-WX-BRIEF
NOTAM facility: DAY
Segmented circle: No
Airport manager: David Faler, Asst Park Mgr
419-394-3611
Last FAA inspection: 05/21/2026

FAA remarks

No night operations.
No public docks; prior permission required for private dock tie up; call kozy marina 419-394-8797.
For CD contact Columbus approach at 614-338-8537.

Source: FAA Airport Data and Information Portal (ADIP), effective October 29, 2026. View this airport on the FAA site

Seaplane base facts

FAA identifier: O12
Location: St Marys, OH, United States
Elevation: 871 ft
Time zone: America/New_York
Coordinates: 40.54102, -84.49067

Runways

Runway	Size	Surface
09W / 27W	7,000 × 4,000 ft	Water

Codes, elevation and runways: FAA airport data (NASR), effective 2026-10-29. Reference only, not for navigation.

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