Originally part of Frankfort, it was settled in 1759 when Fort Pownall was completed at Fort Point on Cape Jellison. Prospect was set off and incorporated in 1794. Land was then set off from Prospect in 1845 to form part of Searsport. Stockton was set off and incorporated in 1857. Shipbuilding was an early industry. By 1859, the town had one gristmill, three sawmills and a shingle mill. Construction on Fort Knox began in 1844, using granite from Mount Waldo in Frankfort. It was built to defend the Penobscot River and the lumber port of Bangor during the Aroostook War. Although never fully completed, work on the huge defense stopped in 1869.
As of the census of 2010, there were 709 people, 291 households, and 197 families living in the town. The population density was. There were 337 housing units at an average density of. The racial makeup of the town was 98.4% White, 0.3% African American, 0.4% Native American, 0.1% Asian, and 0.7% from two or more races. Hispanic or Latino of any race were 0.3% of the population. There were 291 households of which 32.3% had children under the age of 18 living with them, 52.9% were married couplesliving together, 10.3% had a female householder with no husband present, 4.5% had a male householder with no wife present, and 32.3% were non-families. 23.7% of all households were made up of individuals and 6.9% had someone living alone who was 65 years of age or older. The average household size was 2.44 and the average family size was 2.84. The median age in the town was 44.3 years. 21.7% of residents were under the age of 18; 6.3% were between the ages of 18 and 24; 23.1% were from 25 to 44; 36% were from 45 to 64; and 12.8% were 65 years of age or older. The gender makeup of the town was 51.6% male and 48.4% female.
2000 census
As of the census of 2000, there were 642 people, 253 households, and 190 families living in the town. The population density was 35.5 people per square mile. There were 286 housing units at an average density of 15.8 per square mile. The racial makeup of the town was 98.60% White, 0.16% Native American, and 1.25% from two or more races. Hispanic or Latino of any race were 0.16% of the population. There were 253 households out of which 34.8% had children under the age of 18 living with them, 57.7% were married couples living together, 10.7% had a female householder with no husband present, and 24.9% were non-families. 19.8% of all households were made up of individuals and 5.5% had someone living alone who was 65 years of age or older. The average household size was 2.54 and the average family size was 2.86. In the town, the population was spread out with 26.5% under the age of 18, 5.8% from 18 to 24, 33.0% from 25 to 44, 25.4% from 45 to 64, and 9.3% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 114.0 males. For every 100 females age 18 and over, there were 105.2 males. The median income for a household in the town was $36,607, and the median income for a family was $41,406. Males had a median income of $32,292 versus $24,750 for females. The per capita income for the town was $20,243. About 7.6% of families and 10.4% of the population were below the poverty line, including 17.2% of those under age 18 and 8.9% of those age 65 or over.
