Topsham is a town in Sagadahoc County, Maine, United States. The population was 8,784 at the 2010 census. It is part of the Portland–South Portland–Biddeford, Maine metropolitan statistical area. The town is home to the annual Topsham Fair.
According to the United States Census Bureau, the town has a total area of 35.59 square miles (92.18 km), of which 32.20 square miles (83.40 km) is land and 3.39 square miles (8.78 km) is water. Located beside Merrymeeting Bay at the mouth of the Androscoggin River, Topsham is drained by the Cathance River, Little River and Muddy River.
The town is crossed by Interstate 295, U.S. Route 201, and state routes 24 and 196. It borders the towns of Bowdoin and Bowdoinham to the north, Brunswick to the south, and Durham and Lisbon to the northwest. The highest point in the town is Tate Hill.
As of the census of 2010, there were 8,784 people, 3,720 households, and 2,453 families residing in the town. The population density was 272.8 inhabitants per square mile (105.3/km). There were 4,167 housing units at an average density of 129.4 per square mile (50.0/km). The racial makeup of the town was 96.1% White, 0.8% African American, 0.3% Native American, 1.3% Asian, 0.3% from other races, and 1.2% from two or more races. Hispanic or Latino of any race were 1.6% of the population.
There were 3,720 households, of which 28.6% had children under the age of 18 living with them. 52.8% were married couples living together, 9.5% had a female householder with no husband present, 3.6% had a male householder with no wife present, and 34.1% were non-families. 27.0% of all households were made up of individuals. 12.5% had someone living alone who was 65 years of age or older. The average household size was 2.32 persons and the average family size was 2.81 persons.
The median age in the town was 45.2 years. 20.6% of residents were under the age of 18; 5.6% were between the ages of 18 and 24; 23.4% were from 25 to 44; 31.6% were from 45 to 64; and 18.8% were 65 years of age or older. The gender makeup of the town was 47.4% male and 52.6% female.
As of the census of 2000, there were 9,100 people, 3,424 households, and 2,461 families residing in the town.
The median income for a household in the town was $47,682, and the median income for a family was $52,134. Males had a median income of $35,943 versus $25,581 for females. The per capita income for the town was $21,135. About 3.0% of families and 4.1% of the population were below the poverty line, including 5.8% of those under age 18 and none of those age 65 or over.