City in LaSalle County, Illinois · 14.9 sq mi · 1,253 people per sq mi
About 19,000 people live in Ottawa. The typical household earns $71,413, and the median resident is 39.8 years old.
2026 projection
From 18,803 in 2020
Poverty rate 17.3%
Men 39.5 · Women 39.9
1870–2026
18,663
2026 projection
0.7% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1870–2026
18,663
2026 projection
0.7% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 18,663 | -21 | 0.11% |
|---|---|---|---|
| 2025 | 18,684 | -35 | 0.19% |
| 2024 | 18,719 | +14 | 0.07% |
| 2023 | 18,705 | +69 | 0.37% |
| 2022 | 18,636 | -138 | 0.74% |
| 2021 | 18,774 | -29 | 0.15% |
| 2020 | 18,803 | +664 | 3.66% |
| 2019 | 18,139 | -78 | 0.43% |
| 2018 | 18,217 | -50 | 0.27% |
| 2017 | 18,267 | -76 | 0.41% |
Showing 10 of 31 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 184 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 6 residents
43% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 43% | 46% | 41% |
| Never married | 34% | 38% | 30% |
| Divorced | 13% | 12% | 15% |
| Widowed | 7% | 2% | 13% |
| Separated | 2% | 3% | <1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau