2020 census As of the
2020 census, the borough had a population of 107,081. The median age was 36.3 years. 27.1% of residents were under the age of 18 and 13.3% of residents were 65 years of age or older. For every 100 females there were 107.1 males, and for every 100 females age 18 and over there were 106.8 males age 18 and over. The racial makeup of the borough was 77.5% White, 1.0%
Black or African American, 6.4%
American Indian and Alaska Native, 1.5%
Asian, 0.5%
Native Hawaiian and
Pacific Islander, 1.6% from some other race, and 11.5% from
two or more races.
Hispanic or Latino residents of any race comprised 4.9% of the population. 49.9% of residents lived in urban areas, while 50.1% lived in rural areas. There were 38,380 households in the borough, of which 35.4% had children under the age of 18 living with them and 19.2% had a female householder with no spouse or partner present. About 23.2% of all households were made up of individuals and 8.3% had someone living alone who was 65 years of age or older. There were 20,556 households, out of which 42.30% had children under the age of 18 living with them, 58.90% were
married couples living together, 9.10% had a female householder with no husband present, and 26.80% were non-families. 20.30% of all households were made up of individuals, and 4.10% had someone living alone who was 65 years of age or older. The average household size was 2.84 and the average family size was 3.29. In the borough the population was spread out, with 32.20% under the age of 18, 7.40% from 18 to 24, 31.10% from 25 to 44, 23.40% from 45 to 64, and 5.90% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 108.20 males. For every 100 females age 18 and over, there were 108.10 males. Schools in the borough are administered by the
Matanuska-Susitna Borough School District. ==Politics and government==