Kewanee () is a city in Henry County, Illinois, United States. "Kewanee" is the Winnebago word for greater prairie chicken, which lived there. The population was 12,509 at the 2020 census, down from 12,944 in 2000. Geography According to the 2010 census, Kewanee has a total area of , of which (or 99.82%) is land and (or 0.18%) is water. Demographics 2000 census At the 2000 census there were 12,944 people in 5,353 households, including 3,377 families, in the city. The population density was . There were 5,879 housing units at an average density of . The racial makeup of the city was 90.27% White, 3.68% African American, 0.06% Native American, 0.35% Asian, 0.02% Pacific Islander, 3.69% from other races, and 1.95% from two or more races. Hispanic or Latino of any race were 6.10%. Of the 5,353 households 28.5% had children under the age of 18 living with them, 47.0% were married couples living together, 12.3% had a female householder with no husband present, and 36.9% were non-families. 32.2% of households were one person and 17.7% were one person aged 65 or older. The average household size was 2.38 and the average family size was 2.98. The age distribution was 24.8% under the age of 18, 8.9% from 18 to 24, 25.4% from 25 to 44, 20.5% from 45 to 64, and 20.5% 65 or older. The median age was 38 years. For every 100 females, there were 88.8 males. For every 100 females age 18 and over, there were 84.7 males. The median household income was $29,895 and the median family income was $37,730. Males had a median income of $29,065 versus $19,792 for females. The per capita income for the city was $15,746. About 10.7% of families and 13.9% of the population were below the poverty line, including 21.0% of those under age 18 and 8.9% of those age 65 or over. 2010 census According to the 2020 census, the city had a population of 12,509. Of this, 11,241 (87.03%) were white, 633 (4.90%) were black or African American, 624 (4.83%) were some other race, 325 (2.52%) were two or more races, 51 (0.39%) were Asian, 38 (0.29%) were American Indian or Alaska Native. 1,350 (10.45%) were Hispanic or Latino of any race. Industry Kewanee was once known for its fire-tube boiler industry. The Kewanee Boiler Corporation manufactured and sold boilers throughout the world for over one