Spring Valley is a city situated on the Illinois River in Bureau County, Illinois, United States. The population was 5,582 at the 2020 census, up from 5,558 in 2010. It is part of the Ottawa Micropolitan Statistical Area. Geography Spring Valley is located at (41.327154, -89.200752). According to the 2021 census gazetteer files, Spring Valley has a total area of , of which (or 99.47%) is land and (or 0.53%) is water. Demographics As of the 2020 census there were 5,582 people, 2,221 households, and 1,421 families residing in the city. The population density was . There were 2,539 housing units at an average density of . The racial makeup of the city was 79.34% White, 1.83% African American, 0.64% Native American, 0.95% Asian, 7.40% from other races, and 9.84% from two or more races. Hispanic or Latino of any race were 18.70% of the population. There were 2,221 households, out of which 38.41% had children under the age of 18 living with them, 47.32% were married couples living together, 10.45% had a female householder with no husband present, and 36.02% were non-families. 29.27% of all households were made up of individuals, and 17.87% had someone living alone who was 65 years of age or older. The average household size was 2.75 and the average family size was 2.26. The city's age distribution consisted of 19.7% under the age of 18, 9.3% from 18 to 24, 21.9% from 25 to 44, 26.4% from 45 to 64, and 22.5% who were 65 years of age or older. The median age was 43.8 years. For every 100 females, there were 99.0 males. For every 100 females age 18 and over, there were 90.3 males. The median income for a household in the city was $50,549, and the median income for a family was $58,545. Males had a median income of $42,969 versus $17,281 for females. The per capita income for the city was $26,500. About 11.9% of families and 14.0% of the population were below the poverty line, including 24.7% of those under age 18 and 8.2% of those age 65 or over. Name Spring Valley lies in the valley of Spring Creek. The hills on either side of this valley were, and are to some extent today, laced with springs that still feed Spring Creek. There were numerous springs in the town itself. One in the vicinity of the once Hunter-Doherty