Grand Lake St Marys Seaplane Base

Seaplane base

Grand Lake St Marys Seaplane Base is a seaplane base near St Marys in Ohio, United States. The airport is located at 40.5410° / -84.4907° at an elevation of 265 m (871 ft). There is one runway, the longest measuring 2,134 m. The nearest airport is Mulholland Airport, 3.6 km (2 mi) away. No scheduled service is recorded for this airfield.

Symbolic aviation imagery (AI-generated) – not a photo of this specific airport.

Map detail of Grand Lake St Marys Seaplane Base with runways — Close-up with runways

World map showing the position of Grand Lake St Marys Seaplane Base — Overview map

Data

Data
Local code	`O12`
Identifier	`O12`
Type	Seaplane base
City	St Marys
Region	Ohio
Country	United States
Coordinates	40.54100, -84.49070
Coordinates (deg/min/sec)	40° 32′ 27.60″ N 84° 29′ 26.52″ W
Elevation	265 m (871 ft)
Scheduled service	no

Travel gear that fits

Automatically selected recommendations for a trip to Grand Lake St Marys Seaplane Base – based on climate, location and airport type.

Packable rain jacket
Changeable weather at your destination – windproof, water-repellent and packs down small.
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Waterproof dry bag
Boat, seaplane and island transfers: your electronics stay dry.
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Travel adapter A/B
The destination uses socket types A/B at 120 V – the right adapter keeps everything charged.
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Travel guide United States
Background on the country and its people around United States – for after you land.
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Microfibre towel
Dries fast, weighs almost nothing – ideal in coastal and island regions.
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Airband scanner
Listen in on tower and approach frequencies – a classic among aviation fans.
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