| Official Name: | Littlejohn Island, Maine |
| Settlement Type: | Census-designated place |
| Mapsize: | 260px |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Maine |
| Subdivision Type2: | County |
| Subdivision Name2: | Cumberland |
| Subdivision Type3: | Town |
| Subdivision Name3: | Yarmouth |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 1.89 |
| Area Land Km2: | 0.88 |
| Area Water Km2: | 1.01 |
| Area Total Sq Mi: | 0.73 |
| Area Land Sq Mi: | 0.34 |
| Area Water Sq Mi: | 0.39 |
| Population As Of: | 2020 |
| Population Total: | 116 |
| Population Density Km2: | 131.13 |
| Population Density Sq Mi: | 339.18 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 93 |
| Coordinates: | 43.7614°N -70.1267°W |
| Area Code: | 207 |
| Blank Name: | FIPS code |
| Blank Info: | 23-40470 |
Littlejohn Island is an island and census-designated place (CDP) in the town of Yarmouth in Cumberland County, Maine, United States. The population of the CDP was 118 at the 2010 census.[2]
It is part of the Portland - South Portland - Biddeford, Maine Metropolitan Statistical Area.
The island, Cousins River and Cousins Island are named after Englishman John Cousins (1596–1682), who emigrated from Marlborough, Wiltshire.
Littlejohn Island is located in Casco Bay at 43.7614°N -70.1267°W. It is connected by a causeway to Cousins Island, which is connected by a bridge to the mainland in Yarmouth. According to the United States Census Bureau, the Littlejohn Island CDP has a total area of 1.9km2, of which 0.9km2 is the island and 1km2, or 53.25%, is in the water surrounding the island.[3]