Climate

This climatic region is typified by large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters. According to the Köppen Climate Classification system, Andover has a humid continental climate, abbreviated "Dfb" on climate maps.^[6]

2010 census

As of the census^[2] of 2010, there were 821 people, 385 households, and 253 families living in the town. The population density was 14.3 inhabitants per square mile (5.5/km²). There were 603 housing units at an average density of 10.5 per square mile (4.1/km²). The racial makeup of the town was 98.8% White, 0.4% Native American, 0.4% Asian, and 0.5% from two or more races.

There were 385 households, of which 20.5% had children under the age of 18 living with them, 52.5% were married couples living together, 7.8% had a female householder with no husband present, 5.5% had a male householder with no wife present, and 34.3% were non-families. 28.3% of all households were made up of individuals, and 12.7% had someone living alone who was 65 years of age or older. The average household size was 2.13 and the average family size was 2.57.

The median age in the town was 51.1 years. 15.6% of residents were under the age of 18; 4.7% were between the ages of 18 and 24; 20.5% were from 25 to 44; 35.3% were from 45 to 64; and 23.9% were 65 years of age or older. The gender makeup of the town was 50.7% male and 49.3% female.

2000 census

As of the census^[10] of 2000, there were 864 people, 359 households, and 257 families living in the town. The population density was 15.1 inhabitants per square mile (5.8/km²). There were 553 housing units at an average density of 9.6 per square mile (3.7/km²). The racial makeup of the town was 98.96% White, 0.46% African American, 0.12% Native American, 0.12% from other races, and 0.35% from two or more races. Hispanic or Latino of any race were 0.35% of the population.

There were 359 households, out of which 27.6% had children under the age of 18 living with them, 61.8% were married couples living together, 5.8% had a female householder with no husband present, and 28.4% were non-families. 23.4% of all households were made up of individuals, and 9.2% had someone living alone who was 65 years of age or older. The average household size was 2.41 and the average family size was 2.81.

In the town, the population was spread out, with 23.3% under the age of 18, 3.5% from 18 to 24, 28.0% from 25 to 44, 30.7% from 45 to 64, and 14.6% who were 65 years of age or older. The median age was 42 years. For every 100 females, there were 99.5 males. For every 100 females age 18 and over, there were 100.3 males.

The median income for a household in the town was $36,058, and the median income for a family was $40,855. Males had a median income of $32,031 versus $20,000 for females. The per capita income for the town was $20,253. About 9.0% of families and 12.2% of the population were below the poverty line, including 18.3% of those under age 18 and 13.3% of those age 65 or over.