Allen's Island | |
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| Nearest city | St. George, Maine |
|---|---|
| Coordinates | 43°52′0″N 69°18′51″W / 43.86667°N 69.31417°W |
| Area | less than one acre (listed area) |
| NRHP reference No. | 83003646[1] |
| Added to NRHP | December 15, 1983 |
Allen Island or Allen's Island is a 450-acre (180 ha) private island which is part of St. George, Knox County, Maine, United States. it is located near the southeastern end of Muscongus Bay, roughly midway between the southernmost parts of the St. George's mainland, and Monhegan Island.