City in Lake County, Illinois · 17.2 sq mi · 1,153 people per sq mi
About 20,000 people live in Lake Forest. The typical household earns $235,081, and the median resident is 46.1 years old.
2026 projection
From 19,350 in 2020
Poverty rate 3.51%
Men 44.6 · Women 48.3
1880–2026
19,831
2026 projection
2.5% since 2020 (increase)
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.
1880–2026
19,831
2026 projection
2.5% since 2020 (increase)
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 | 19,831 | +100 | 0.51% |
|---|---|---|---|
| 2025 | 19,731 | -21 | 0.11% |
| 2024 | 19,752 | +152 | 0.78% |
| 2023 | 19,600 | +191 | 0.98% |
| 2022 | 19,409 | -83 | 0.43% |
| 2021 | 19,492 | +142 | 0.73% |
| 2020 | 19,350 | -107 | 0.55% |
| 2019 | 19,457 | -77 | 0.39% |
| 2018 | 19,534 | -72 | 0.37% |
| 2017 | 19,606 | +199 | 1.03% |
Showing 10 of 30 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 194 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 28 residents
60% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 60% | 62% | 58% |
| Never married | 28% | 32% | 24% |
| Divorced | 6% | 4% | 9% |
| Widowed | 6% | 2% | 10% |
| Separated | <1% | <1% | <1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau