CDP in Lake County, Illinois · 0.6 sq mi · 3,214 people per sq mi
About 1,900 people live in Knollwood. The typical household earns $138,618, and the median resident is 36.4 years old.
2026 projection
From 1,684 in 2020
Poverty rate 7.83%
Men 32.8 · Women 45.5
2011–2026
1,944
2026 projection
15.4% 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.
2011–2026
1,944
2026 projection
15.4% 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 | 1,944 | +12 | 0.62% |
|---|---|---|---|
| 2025 | 1,932 | +25 | 0.65% |
| 2023 | 1,907 | +144 | 8.17% |
| 2022 | 1,763 | +44 | 2.56% |
| 2021 | 1,719 | +35 | 2.08% |
| 2020 | 1,684 | +19 | 1.14% |
| 2019 | 1,665 | -155 | 8.52% |
| 2018 | 1,820 | +6 | 0.33% |
| 2017 | 1,814 | +85 | 4.92% |
| 2016 | 1,729 | +116 | 7.19% |
Showing 10 of 15 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 19 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 13 residents
59% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 59% | 67% | 53% |
| Never married | 28% | 26% | 29% |
| Divorced | 6% | 4% | 8% |
| Widowed | 5% | 2% | 8% |
| Separated | 2% | 2% | 1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau