Rock Falls, Illinois
| Rock Falls | |
| City | |
| Country | United States |
|---|---|
| State | Illinois |
| County | Whiteside |
| Coordinates | 41°46′29″N 89°41′29″W / 41.77472°N 89.69139°WCoordinates: 41°46′29″N 89°41′29″W / 41.77472°N 89.69139°W |
| Area | 3.79 sq mi (10 km2) |
| - land | 3.66 sq mi (9 km2) |
| - water | 0.14 sq mi (0 km2) |
| Population | 9,266 (2010) |
| Timezone | CST (UTC-6) |
| - summer (DST) | CDT (UTC-5) |
| Postal code | 61071 |
| Area code | 815 |
   Location of Rock Falls within Illinois
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Rock Falls is a city in Whiteside County, Illinois, United States. The population was 9,266 at the 2010 census, down from 9,580 in 2000. The city is located on the Rock River, directly opposite Sterling.
Rock Falls is separated from its sister city, Sterling, to the North by the Rock River.
According to the 2010 census, Rock Falls has a total area of 3.795 square miles (9.83 km2), of which 3.66 square miles (9.48 km2) (or 96.44%) is land and 0.135 square miles (0.35 km2) (or 3.56%) is water.
As of the census of 2000, there were 9,580 people, 3,895 households, and 2,559 families residing in the city. The population density was 2,888.0 people per square mile (1,114.1/km²). There were 4,098 housing units at an average density of 1,235.4 per square mile (476.6/km²). The racial makeup of the city was 91.78% White, 0.88% African American, 0.45% Native American, 0.26% Asian, 4.71% from other races, and 1.92% from two or more races. Hispanic or Latino of any race were 11.54% of the population.
There were 3,895 households out of which 30.7% had children under the age of 18 living with them, 47.5% were married couples living together, 13.7% had a female householder with no husband present, and 34.3% were non-families. 29.4% of all households were made up of individuals and 13.9% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 2.99.
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