Rock Falls | |
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![]() The Lawrence Hardware building (right) in Sterling overlooking the bridge to Rock Falls, Illinois | |
![]() Location of Rock Falls in Whiteside County, Illinois. | |
![]() Location of Illinois in the United States | |
Coordinates: 41°46′29″N 89°41′29″W / 41.77472°N 89.69139°W | |
Country | United States |
State | Illinois |
County | Whiteside |
Founded by | A.P. Smith |
Government | |
• Type | Mayor-council |
• Mayor | Rodney Kleckler |
• City Attorney | James L. Reese |
Area | |
• Total | 4.12 sq mi (10.68 km2) |
• Land | 3.98 sq mi (10.32 km2) |
• Water | 0.14 sq mi (0.36 km2) |
Population (2020) | |
• Total | 8,789 |
• Density | 2,206.63/sq mi (852.02/km2) |
Time zone | UTC−6 (CST) |
• Summer (DST) | UTC−5 (CDT) |
ZIP Code(s) | 61071 |
Area code | 815 |
FIPS code | 17-64928 |
Wikimedia Commons | Rock Falls, Illinois |
Website | rockfalls61071 |
Rock Falls is a city in Whiteside County, Illinois, United States. The recorded population was 8,606 at the 2020 census, down 7.12% from 9,266 in 2010. The city is located on the Rock River, directly opposite its twin city of Sterling.