Upton is a town in Oxford County, Maine. The population was 113 at the 2010 census.
According to the United States Census Bureau, the town has a total area of 41.83 square miles (108.34 km), of which, 39.51 square miles (102.33 km) of it is land and 2.32 square miles (6.01 km) is water.
As of the census of 2010, there were 113 people, 61 households, and 30 families residing in the town. The population density was 2.9 inhabitants per square mile (1.1/km). There were 199 housing units at an average density of 5.0 per square mile (1.9/km). The racial makeup of the town was 98.2% White and 1.8% Native American.
There were 61 households of which 13.1% had children under the age of 18 living with them, 45.9% were married couples living together, 1.6% had a female householder with no husband present, 1.6% had a male householder with no wife present, and 50.8% were non-families. 36.1% of all households were made up of individuals and 18% had someone living alone who was 65 years of age or older. The average household size was 1.85 and the average family size was 2.40.
The median age in the town was 57.1 years. 10.6% of residents were under the age of 18; 1.8% were between the ages of 18 and 24; 9.8% were from 25 to 44; 48.6% were from 45 to 64; and 29.2% were 65 years of age or older. The gender makeup of the town was 53.1% male and 46.9% female.
As of the 2000 census, there were 62 people, 33 households, and 20 families residing in the town. The population density was 1.6 people per square mile (0.6/km²). There were 173 housing units at an average density of 4.3 per square mile (1.7/km²). The racial makeup of the town was 98.39% White and 1.61% Asian.
There were 33 households out of which 9.1% had children under the age of 18 living with them, 51.5% were married couples living together, 6.1% had a female householder with no husband present, and 36.4% were non-families. 24.2% of all households were made up of individuals and 3.0% had someone living alone who was 65 years of age or older. The average household size was 1.88 and the average family size was 2.14.
In the town, the population was spread out with 6.5% under the age of 18, 1.6% from 18 to 24, 17.7% from 25 to 44, 51.6% from 45 to 64, and 22.6% who were 65 years of age or older. The median age was 56 years. For every 100 females, there were 106.7 males. For every 100 females age 18 and over, there were 114.8 males.
The median income for a household in the town was $35,000, and the median income for a family was $55,625. Males had a median income of $26,250 versus $0 for females. The per capita income for the town was $24,320. There were 19.0% of families and 27.3% of the population living below the poverty line, including no under eighteens and none of those over 64.