City in Sioux County, Iowa · 1.9 sq mi · 661 people per sq mi
About 1,300 people live in Alton. The typical household earns $98,036, and the median resident is 38.1 years old.
2026 projection
From 1,238 in 2020
Poverty rate 2.6%
Men 37.4 · Women 41.1
2010–2026
1,257
2026 projection
1.5% 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.
2010–2026
1,257
2026 projection
1.5% 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 | 1,257 | +3 | 0.24% |
|---|---|---|---|
| 2025 | 1,254 | +2 | 0.16% |
| 2024 | 1,252 | +13 | 1.05% |
| 2023 | 1,239 | +7 | 0.57% |
| 2022 | 1,232 | +5 | 0.41% |
| 2021 | 1,227 | -11 | 0.89% |
| 2020 | 1,238 | -13 | 1.04% |
| 2019 | 1,251 | -6 | 0.48% |
| 2018 | 1,257 | -3 | 0.24% |
| 2017 | 1,260 | -9 | 0.71% |
Showing 10 of 17 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 15 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 38 residents
67% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 67% | 64% | 69% |
| Never married | 24% | 29% | 19% |
| Divorced | 3% | 2% | 4% |
| Widowed | 5% | 3% | 9% |
| Separated | 1% | 2% | 0% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau