Spring Valley is a city located in Bureau County Illinois. With a 2020 population of 5,007, it is the 330th largest city in Illinois and the 4766th largest city in the United States . Spring Valley is currently declining at a rate of -1.16% annually and its population has decreased by -9.91% since the most recent census, which recorded a population of 5,558 in 2010. Spring Valley reached it's highest population of 7,035 in 1910. Spanning over 7 miles, Spring Valley has a population density of 681 people per square mile.
The average household income in Spring Valley is $63,731 with a poverty rate of 13.17%. The median rental costs in recent years comes to $547 per month, and the median house value is $113,200. The median age in Spring Valley is 42.7 years, 39.2 years for males, and 45.2 years for females.