Westport Island, formerly Westport, is a town in Lincoln County, Maine, United States. In the 19th Century the island was known as Jeremysquam, a nickname islanders still use for it. The population was 718 at the 2010 census.
Westport Island is located approximately 50 miles northeast of Portland, Maine. The island is separated from the mainland by two coastal salt-water rivers, the Sheepscot River and the Back River. The island is connected to the mainland at the Northwest by one modern bridge, built in 1972 over a slim gap in the Back River called Cowsegan Narrows. Although completely surrounded by water, it is bounded across tidal water by the towns of Wiscasset, Edgecomb, Southport, and Georgetown.
According to the United States Census Bureau, the town has a total area of 14.24 square miles (36.88 km), of which, 8.81 square miles (22.82 km) of it is land and 5.43 square miles (14.06 km) is water.
As of the census of 2010, there were 718 people, 329 households, and 227 families residing in the town. The population density was 81.5 inhabitants per square mile (31.5/km). There were 535 housing units at an average density of 60.7 per square mile (23.4/km). The racial makeup of the town was 97.8% White, 0.1% African American, 0.3% Native American, 0.3% Asian, 0.4% from other races, and 1.1% from two or more races. Hispanic or Latino of any race were 1.0% of the population.
There were 329 households of which 21.0% had children under the age of 18 living with them, 57.4% were married couples living together, 6.7% had a female householder with no husband present, 4.9% had a male householder with no wife present, and 31.0% were non-families. 23.1% of all households were made up of individuals and 9.4% had someone living alone who was 65 years of age or older. The average household size was 2.18 and the average family size was 2.48.
The median age in the town was 52 years. 15.2% of residents were under the age of 18; 4% were between the ages of 18 and 24; 20% were from 25 to 44; 36.9% were from 45 to 64; and 24% were 65 years of age or older. The gender makeup of the town was 49.9% male and 50.1% female.
As of the census of 2000, there were 745 people, 318 households, and 228 families residing in the town. The population density was 85.2 people per square mile (32.9/km²). There were 510 housing units at an average density of 58.3 per square mile (22.5/km²). The racial makeup of the town was 98.26% White, 0.13% African American, 0.67% Native American, and 0.94% from two or more races.
There were 318 households out of which 26.1% had children under the age of 18 living with them, 62.9% were married couples living together, 6.3% had a female householder with no husband present, and 28.0% were non-families. 24.2% of all households were made up of individuals and 8.8% had someone living alone who was 65 years of age or older. The average household size was 2.33 and the average family size was 2.74.
In the town, the population was spread out with 22.4% under the age of 18, 3.1% from 18 to 24, 24.7% from 25 to 44, 32.6% from 45 to 64, and 17.2% who were 65 years of age or older. The median age was 45 years. For every 100 females, there were 98.1 males. For every 100 females age 18 and over, there were 100.7 males.
The median income for a household in the town was $39,010, and the median income for a family was $42,625. Males had a median income of $32,426 versus $27,647 for females. The per capita income for the town was $21,623. About 5.2% of families and 6.6% of the population were below the poverty line, including 7.6% of those under age 18 and 7.5% of those age 65 or over.