2020 census As of the
2020 census, Thief River Falls had a population of 8,749. The median age was 38.9 years. 21.6% of residents were under the age of 18 and 19.2% of residents were 65 years of age or older. For every 100 females there were 95.6 males, and for every 100 females age 18 and over there were 95.0 males age 18 and over. 99.9% of residents lived in urban areas, while 0.1% lived in rural areas. There were 4,070 households in Thief River Falls, of which 24.6% had children under the age of 18 living in them. Of all households, 35.2% were married-couple households, 23.9% were households with a male householder and no spouse or partner present, and 31.7% were households with a female householder and no spouse or partner present. About 40.7% of all households were made up of individuals and 16.5% had someone living alone who was 65 years of age or older. There were 4,469 housing units, of which 8.9% were vacant. The homeowner vacancy rate was 1.4% and the rental vacancy rate was 10.4%.
2010 census As of the
census of 2010, there were 8,573 people, 3,802 households, and 2,141 families residing in the city. The
population density was . There were 4,061 housing units at an average density of . The racial makeup of the city was 92.0%
White, 2.1%
African American, 1.9%
Native American, 0.7%
Asian, 1.0% from
other races, and 2.3% from two or more races.
Hispanic or
Latino of any race were 3.2% of the population. There were 3,802 households, of which 27.6% had children under the age of 18 living with them, 39.0% were
married couples living together, 12.2% had a female householder with no husband present, 5.2% had a male householder with no wife present, and 43.7% were non-families. 36.6% of all households were made up of individuals, and 15.1% had someone living alone who was 65 years of age or older. The average household size was 2.18 and the average family size was 2.81. The median age in the city was 37.6 years. 22.5% of residents were under the age of 18; 10.5% were between the ages of 18 and 24; 24.9% were from 25 to 44; 24.3% were from 45 to 64; and 17.7% were 65 years of age or older. The gender makeup of the city was 47.7% male and 52.3% female.
2000 census As of the
census of 2000, there were 8,410 people, 3,619 households, and 2,091 families residing in the city. The population density was . There were 3,931 housing units at an average density of . The racial makeup of the city was 96.56%
White, 0.27%
African American, 0.95%
Native American, 0.67%
Asian, 0.04%
Pacific Islander, 0.62% from
other races, and 0.90% from two or more races.
Hispanic or
Latino of any race were 1.63% of the population. There were 3,619 households, out of which 27.1% had children under the age of 18 living with them, 44.2% were
married couples living together, 10.6% had a female householder with no husband present, and 42.2% were non-families. 35.1% of all households were made up of individuals, and 15.7% had someone living alone who was 65 years of age or older. The average household size was 2.21 and the average family size was 2.84. , Main Ave In the city, the population was spread out, with 22.4% under the age of 18, 11.7% from 18 to 24, 26.1% from 25 to 44, 20.9% from 45 to 64, and 18.8% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 90.4 males. For every 100 females age 18 and over, there were 85.8 males. The median income for a household in the city was $30,759, and the median income for a family was $40,908. Males had a median income of $30,332 versus $20,785 for females. The
per capita income for the city was $17,489. About 8.0% of families and 12.4% of the population were below the
poverty line, including 11.3% of those under age 18 and 15.7% of those age 65 or over. ==Economy==