Village in Sangamon County, Illinois · 2.7 sq mi · 1,541 people per sq mi
About 4,100 people live in Rochester. The typical household earns $117,118, and the median resident is 39.8 years old.
2026 projection
From 3,863 in 2020
Poverty rate 2.51%
Men 38.1 · Women 45.2
1880–2026
4,134
2026 projection
7% 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
4,134
2026 projection
7% 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 | 4,134 | +41 | 1.00% |
|---|---|---|---|
| 2025 | 4,093 | +66 | 1.64% |
| 2024 | 4,027 | +115 | 2.94% |
| 2023 | 3,912 | +57 | 1.48% |
| 2022 | 3,855 | -7 | 0.18% |
| 2021 | 3,862 | -1 | 0.03% |
| 2020 | 3,863 | +135 | 3.62% |
| 2019 | 3,728 | -13 | 0.35% |
| 2018 | 3,741 | -20 | 0.53% |
| 2017 | 3,761 | -15 | 0.40% |
Showing 10 of 29 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 38 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 40 residents
58% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 58% | 59% | 57% |
| Never married | 25% | 26% | 24% |
| Divorced | 10% | 10% | 10% |
| Widowed | 7% | 6% | 9% |
| Separated | <1% | 0% | <1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau