According to the United States Census Bureau, the Farmington CDP has a total area of 4.05 square miles (10.48 km2), of which 4.03 square miles (10.45 km2) is land and 0.01 square miles (0.03 km2), or 0.24%, is water.[2] The Sandy River, a tributary of the Kennebec River, flows from north to south through the western side of the CDP. West Farmington, a neighborhood included within the CDP, is on the west side of the river, across from the town center, connected by a bridge on US 2. Temple Stream joins the Sandy River from the west in the southwestern part of the CDP.
As of the census[5] of 2000, there were 4,098 people, 1,568 households, and 625 families residing in the CDP. The population density was 1,015.8 inhabitants per square mile (392.2/km2). There were 1,668 housing units at an average density of 413.4 per square mile (159.6/km2). The racial makeup of the CDP was 96.88% White, 0.37% Black or African American, 0.32% Native American, 0.93% Asian, 0.24% from other races, and 1.27% from two or more races. Hispanic or Latino of any race were 0.85% of the population.
There were 1,568 households, out of which 18.2% had children under the age of 18 living with them, 28.4% were married couples living together, 9.2% had a female householder with no husband present, and 60.1% were non-families. 40.8% of all households were made up of individuals, and 15.6% had someone living alone who was 65 years of age or older. The average household size was 1.99 and the average family size was 2.72.
In the CDP, the population was spread out, with 12.7% under the age of 18, 39.6% from 18 to 24, 17.3% from 25 to 44, 13.8% from 45 to 64, and 16.6% who were 65 years of age or older. The median age was 24 years. For every 100 females, there were 69.8 males. For every 100 females age 18 and over, there were 64.7 males.
The median income for a household in the CDP was $22,130, and the median income for a family was $31,471. Males had a median income of $31,296 versus $20,385 for females. The per capita income for the CDP was $12,455. About 31.3% of families and 33.4% of the population were below the poverty line, including 46.6% of those under age 18 and 4.6% of those age 65 or over.