City in Montgomery County, Illinois · 8.6 sq mi · 718 people per sq mi
6,199 people live in Hillsboro. The typical household earns $50,158, and the median resident is 40.4 years old.
2026 projection
From 5,902 in 2020
Poverty rate 11.64%
Men 38.2 · Women 49.8
1860–2026
6,199
2026 projection
5% 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.
1860–2026
6,199
2026 projection
5% 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 | 6,199 | +15 | 0.24% |
|---|---|---|---|
| 2025 | 6,184 | +253 | 4.27% |
| 2024 | 5,931 | +136 | 2.35% |
| 2023 | 5,795 | -18 | 0.31% |
| 2022 | 5,813 | -39 | 0.67% |
| 2021 | 5,852 | -50 | 0.85% |
| 2020 | 5,902 | -39 | 0.66% |
| 2019 | 5,941 | -52 | 0.87% |
| 2018 | 5,993 | -14 | 0.23% |
| 2017 | 6,007 | -44 | 0.73% |
Showing 10 of 30 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.
Hillsboro is growing faster than Montgomery 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 58 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 9 residents
33% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 33% | 27% | 45% |
| Never married | 40% | 47% | 26% |
| Divorced | 19% | 19% | 19% |
| Widowed | 6% | 4% | 11% |
| Separated | 2% | 3% | <1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources