City in Iowa County, Iowa · 2.1 sq mi · 1,145 people per sq mi
2,421 people live in Marengo. The typical household earns $57,941, and the median resident is 39.6 years old.
2026 projection
From 2,435 in 2020
Poverty rate 13.24%
Men 36.8 · Women 42.1
1850–2026
2,421
2026 projection
0.6% since 2020 (decrease)
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.
1850–2026
2,421
2026 projection
0.6% since 2020 (decrease)
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 | 2,421 | -4 | 0.16% |
|---|---|---|---|
| 2025 | 2,425 | +4 | 0.17% |
| 2024 | 2,421 | +13 | 0.54% |
| 2023 | 2,408 | -14 | 0.58% |
| 2022 | 2,422 | -10 | 0.41% |
| 2021 | 2,432 | -3 | 0.12% |
| 2020 | 2,435 | +1 | 0.04% |
| 2019 | 2,434 | -1 | 0.04% |
| 2018 | 2,435 | -6 | 0.25% |
| 2017 | 2,441 | -15 | 0.61% |
Showing 10 of 32 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.
Marengo has a population change higher than Iowa County, and lower than 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 27 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 8 residents
47% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 47% | 48% | 46% |
| Never married | 27% | 30% | 24% |
| Divorced | 20% | 19% | 22% |
| Widowed | 5% | <1% | 9% |
| Separated | 1% | 3% | 0% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources