City in Carroll County, Illinois · 1.1 sq mi · 1,285 people per sq mi
1,440 people live in Lanark. The typical household earns $59,375, and the median resident is 38.4 years old.
2026 projection
From 1,504 in 2020
Poverty rate 12.65%
Men 34.9 · Women 39.4
2010–2026
1,440
2026 projection
4.3% 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.
2010–2026
1,440
2026 projection
4.3% 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 | 1,440 | -12 | 0.83% |
|---|---|---|---|
| 2025 | 1,452 | -9 | 0.62% |
| 2024 | 1,461 | -13 | 0.88% |
| 2023 | 1,474 | -4 | 0.27% |
| 2022 | 1,478 | -24 | 1.60% |
| 2021 | 1,502 | -2 | 0.13% |
| 2020 | 1,504 | +7 | 0.47% |
| 2019 | 1,497 | +15 | 1.01% |
| 2018 | 1,482 | +3 | 0.20% |
| 2017 | 1,479 | +1 | 0.07% |
Showing 10 of 17 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.
Lanark has a population change lower than Carroll County, Illinois, 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 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 8 residents
55% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 55% | 56% | 54% |
| Never married | 33% | 37% | 28% |
| Divorced | 5% | 4% | 6% |
| Widowed | 8% | 3% | 12% |
| Separated | 0% | 0% | 0% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources