City in Linn County, Iowa · 3.7 sq mi · 1,206 people per sq mi
4,502 people live in Mount Vernon. The typical household earns $112,656, and the median resident is 25.3 years old.
2026 projection
From 4,527 in 2020
Poverty rate 8.16%
Men 22.6 · Women 25.7
1870–2026
4,502
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.
1870–2026
4,502
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 | 4,502 | -12 | 0.27% |
|---|---|---|---|
| 2025 | 4,514 | +19 | 0.42% |
| 2024 | 4,495 | +30 | 0.67% |
| 2023 | 4,465 | -78 | 1.72% |
| 2022 | 4,543 | +34 | 0.75% |
| 2021 | 4,509 | -18 | 0.40% |
| 2020 | 4,527 | +18 | 0.40% |
| 2019 | 4,509 | +10 | 0.22% |
| 2018 | 4,499 | +19 | 0.42% |
| 2017 | 4,480 | +30 | 0.67% |
Showing 10 of 31 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.
Mount Vernon has a population change lower than Linn 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 45 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 12 residents
42% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 42% | 47% | 38% |
| Never married | 44% | 45% | 44% |
| Divorced | 8% | 6% | 9% |
| Widowed | 5% | 2% | 8% |
| Separated | <1% | <1% | <1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources