2020 census As of the
2020 census, Kimball had a population of 572, and the median age was 45.0 years; 22.7% of residents were under the age of 18 and 22.2% were 65 years of age or older. For every 100 females there were 97.9 males, and for every 100 females age 18 and over there were 99.1 males age 18 and over. 0.0% of residents lived in urban areas, while 100.0% lived in rural areas. There were 261 households in Kimball, of which 21.1% had children under the age of 18 living in them. Of all households, 44.1% were married-couple households, 24.5% were households with a male householder and no spouse or partner present, and 28.4% were households with a female householder and no spouse or partner present. About 41.8% of all households were made up of individuals, and 15.7% had someone living alone who was 65 years of age or older. Of the 310 households 29.4% had children under the age of 18 living with them, 46.5% were married couples living together, 8.7% had a female householder with no husband present, 5.8% had a male householder with no wife present, and 39.0% were non-families. 35.2% of households were one person and 21.6% were one person aged 65 or older. The average household size was 2.26 and the average family size was 2.93. The median age was 43 years. 26.6% of residents were under the age of 18; 5.4% were between the ages of 18 and 24; 21.7% were from 25 to 44; 27.2% were from 45 to 64; and 19.2% were 65 or older. The gender makeup of the city was 48.2% male and 51.8% female.
2000 census At the
2000 census there were 745 people in 314 households, including 194 families, in the city. The population density was . There were 351 housing units at an average density of . The
racial makeup of the city was 99.33% White, 0.54% Native American, and 0.13% from two or more races. Of the 314 households 29.9% had children under the age of 18 living with them, 52.2% were married couples living together, 6.4% had a female householder with no husband present, and 37.9% were non-families. 35.4% of households were one person and 19.7% were one person aged 65 or older. The average household size was 2.37 and the average family size was 3.11. The age distribution was 27.9% under the age of 18, 6.4% from 18 to 24, 24.8% from 25 to 44, 17.9% from 45 to 64, and 23.0% 65 or older. The median age was 40 years. For every 100 females, there were 88.1 males. For every 100 females age 18 and over, there were 86.5 males. As of 2000 the median income for a household in the city was $32,167, and the median family income was $37,813. Males had a median income of $27,727 versus $16,544 for females. The per capita income for the city was $15,398. About 5.9% of families and 10.9% of the population were below the
poverty line, including 11.8% of those under age 18 and 16.7% of those age 65 or over. ==Notable person==