City in Jefferson County, Wisconsin · 3.8 sq mi · 957 people per sq mi
About 3,600 people live in Waterloo. The typical household earns $87,776, and the median resident is 37.8 years old.
2026 projection
From 3,487 in 2020
Poverty rate 13.65%
Men 34 · Women 41.6
1870–2026
3,630
2026 projection
4.1% 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.
1870–2026
3,630
2026 projection
4.1% 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 | 3,630 | +30 | 0.83% |
|---|---|---|---|
| 2025 | 3,600 | -10 | 0.28% |
| 2024 | 3,610 | +1 | 0.03% |
| 2023 | 3,609 | -5 | 0.14% |
| 2022 | 3,614 | -34 | 0.93% |
| 2021 | 3,648 | +161 | 4.62% |
| 2020 | 3,487 | +150 | 4.50% |
| 2019 | 3,337 | -19 | 0.57% |
| 2018 | 3,356 | +14 | 0.42% |
| 2017 | 3,342 | +1 | 0.03% |
Showing 10 of 31 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 36 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 7 residents
44% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 44% | 39% | 50% |
| Never married | 38% | 49% | 27% |
| Divorced | 11% | 10% | 13% |
| Widowed | 6% | 2% | 11% |
| Separated | 0% | 0% | 0% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau