City in Sioux County, Iowa · 4.5 sq mi · 938 people per sq mi
About 4,200 people live in Rock Valley. The typical household earns $76,250, and the median resident is 35.1 years old.
2026 projection
From 4,069 in 2020
Poverty rate 9.26%
Men 35.6 · Women 31.3
1880–2026
4,182
2026 projection
2.8% since 2020 (increase)
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.
1880–2026
4,182
2026 projection
2.8% since 2020 (increase)
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 | 4,182 | -6 | 0.14% |
|---|---|---|---|
| 2025 | 4,188 | +143 | 3.54% |
| 2024 | 4,045 | -12 | 0.30% |
| 2023 | 4,057 | -19 | 0.47% |
| 2022 | 4,076 | +2 | 0.05% |
| 2021 | 4,074 | +5 | 0.12% |
| 2020 | 4,069 | +192 | 4.95% |
| 2019 | 3,877 | +25 | 0.65% |
| 2018 | 3,852 | +15 | 0.39% |
| 2017 | 3,837 | +22 | 0.58% |
Showing 10 of 30 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 41 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 11 residents
60% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 60% | 61% | 59% |
| Never married | 31% | 35% | 28% |
| Divorced | 5% | 4% | 5% |
| Widowed | 4% | <1% | 7% |
| Separated | <1% | <1% | <1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau