Seguin Light is a lighthouse on Seguin Island, in the Gulf of Maine south of the mouth of the Kennebec River, Maine. Established in 1795, it is the second-oldest of Maine's coastal lighthouses, and the only lighthouse in the state housing a first-order Fresnel lens.

LLocation: Mouth of the Kennebec River, Maine
Coordinates - 43°42′26.9″N 69°45′28.9″W
Constructed: 1795
Construction: stone
Automated: 1985
Height: 16 m (52 ft)
Shape: Cylindrical Tower
Markings: White
Fog signal: HORN: 2 every 20s
First lit 1857 (current structure)
Deactivated: 2019
Focal height: 180 feet (55 m)
Lens: 1st order Fresnel Lens
Range: 18 nautical miles (33 km; 21 mi)
Characteristic: Flashing White

I visited this light on July 16 2022.

The lighthouse is owned by Friends of Seguin Island. Grounds open, tower/dwelling open from Memorial Day through Labor Day.

This lighthouse is best seen by visiting the island by boat, although a very distant view is possible from Popham Beach.

There are various public cruises that pass the lighthouse. I used the cruise by Maine Maritime Museum out of Bath

Added to the National Register of Historic Places on March 8 1977

Access: Boat