City in Whiteside County, Illinois · 4 sq mi · 2,127 people per sq mi
About 8,500 people live in Rock Falls. The typical household earns $49,600, and the median resident is 37.7 years old.
2026 projection
From 8,770 in 2020
Poverty rate 25.62%
Men 37.7 · Women 38
1870–2026
8,472
2026 projection
3.4% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1870–2026
8,472
2026 projection
3.4% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 8,472 | -49 | 0.58% |
|---|---|---|---|
| 2025 | 8,521 | -54 | 0.63% |
| 2024 | 8,575 | -19 | 0.22% |
| 2023 | 8,594 | -7 | 0.08% |
| 2022 | 8,601 | -121 | 1.39% |
| 2021 | 8,722 | -48 | 0.55% |
| 2020 | 8,770 | +24 | 0.27% |
| 2019 | 8,746 | -53 | 0.60% |
| 2018 | 8,799 | -96 | 1.08% |
| 2017 | 8,895 | -85 | 0.95% |
Showing 10 of 31 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 86 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 4 residents
38% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 38% | 38% | 38% |
| Never married | 36% | 42% | 32% |
| Divorced | 16% | 13% | 18% |
| Widowed | 8% | 6% | 11% |
| Separated | 2% | 2% | 1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau