City in Warren County, Iowa · 11.6 sq mi · 1,320 people per sq mi
15,371 people live in Norwalk. The typical household earns $102,722, and the median resident is 37.8 years old.
2026 projection
From 12,799 in 2020
Poverty rate 4.16%
Men 36.6 · Women 39.3
1900–2026
15,371
2026 projection
20.1% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1900–2026
15,371
2026 projection
20.1% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 15,371 | +367 | 2.45% |
|---|---|---|---|
| 2025 | 15,004 | +672 | 4.69% |
| 2024 | 14,332 | +138 | 0.97% |
| 2023 | 14,194 | +456 | 3.32% |
| 2022 | 13,738 | +400 | 3.00% |
| 2021 | 13,338 | +539 | 4.21% |
| 2020 | 12,799 | +390 | 3.14% |
| 2019 | 12,409 | +500 | 4.20% |
| 2018 | 11,909 | +670 | 5.96% |
| 2017 | 11,239 | +433 | 4.01% |
Showing 10 of 28 years.
The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.
Norwalk is growing faster than Warren County, Iowa, and the U.S.
Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.
Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 142 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 24 residents
58% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 58% | 63% | 55% |
| Never married | 25% | 25% | 24% |
| Divorced | 11% | 9% | 12% |
| Widowed | 5% | 2% | 7% |
| Separated | 1% | <1% | 2% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources