The area embracing North Yarmouth, first settled in 1636, was abandoned twice before successful final settlement in 1713. In 1646, William Royall purchased a farm on the river that, since, has borne his name. John Cousins, a few years previous, occupied a neck of land between branches of a stream and owned an island, both now bearing his name. These settlements were established in the vicinity, called by the Wabanakis, as “Wescustogo”. Yarmouth originally constituted the eastern portion of North Yarmouth; the “North” in the name intended to differentiate it from Yarmouth, Massachusetts, on Cape Cod. North Yarmouth was chartered on September 22, 1680, encompassing the area of the present Town of North Yarmouth and the future towns of Harpswell, Freeport, Pownal, Cumberland, and Yarmouth.
As of the census of 2010, there were 3,565 people, 1,297 households, and 1,036 families living in the town. The population density was. There were 1,354 housing units at an average density of. The racial makeup of the town was 97.4% White, 0.2% African American, 0.1% Native American, 1.0% Asian, 0.3% from other races, and 1.1% from two or more races. Hispanic or Latino of any race were 0.9% of the population. There were 1,297 households of which 42.4% had children under the age of 18 living with them, 68.2% were married couplesliving together, 7.9% had a female householder with no husband present, 3.8% had a male householder with no wife present, and 20.1% were non-families. 14.9% of all households were made up of individuals and 6.4% had someone living alone who was 65 years of age or older. The average household size was 2.74 and the average family size was 3.05. The median age in the town was 42.5 years. 26.6% of residents were under the age of 18; 5.5% were between the ages of 18 and 24; 22.7% were from 25 to 44; 34.7% were from 45 to 64; and 10.4% were 65 years of age or older. The gender makeup of the town was 48.4% male and 51.6% female.
2000 census
As of the census of 2000, there were 3,210 people, 1,118 households, and 924 families living in the town. The population density was 151.9 people per square mile. There were 1,142 housing units at an average density of 54.0 per square mile. The racial makeup of the town was 98.66% White, 0.09% African American, 0.09% Native American, 0.59% Asian, 0.12% from other races, and 0.44% from two or more races. Hispanic or Latino of any race were 0.47% of the population. There were 1,118 households out of which 45.1% had children under the age of 18 living with them, 72.2% were married couples living together, 7.7% had a female householder with no husband present, and 17.3% were non-families. 12.3% of all households were made up of individuals and 3.9% had someone living alone who was 65 years of age or older. The average household size was 2.87 and the average family size was 3.13. In the town, the population was spread out with 30.2% under the age of 18, 3.6% from 18 to 24, 33.5% from 25 to 44, 25.0% from 45 to 64, and 7.6% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 95.9 males. For every 100 females age 18 and over, there were 94.4 males. The median income for a household in the town was $60,850, and the median income for a family was $65,000. Males had a median income of $42,986 versus $29,179 for females. The per capita income for the town was $25,180. About 0.6% of families and 2.3% of the population were below the poverty line, including 1.2% of those under age 18 and 3.3% of those age 65 or over.
