Rock Falls, Illinois

Rock Falls
City
View of downtown buildings in Rock Falls, IL
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 / 41.77472; -89.69139
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 [1]
• 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.net

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.