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Village in Cook County and Lake County, Illinois

Buffalo Grove

District lines run through Buffalo Grove, so who represents you here depends on your street. Search your address to see yours.

Who lives in Buffalo Grove

Census survey estimates for 2020 to 2024, rounded.

People

Population
42,900
Median age
42.0 years
Under 18
25%
65 and over
16%
Veterans, of adults
3%
Speak another language at home
45%

Race and ethnicity

Hispanic or Latino, of any race
6%
White, not Hispanic
58%
Black, not Hispanic
3%
Asian, not Hispanic
30%

Income and housing

Median household income
$129,400
Below the poverty line
7%
Bachelor's or higher, adults 25+
69%
Owner-occupied homes
80%
Median home value
$412,000

2024 vote for president

Not counted for Buffalo Grove on its own: its precincts follow township lines, not the town’s. See the figures for Cook County and Lake County.

Represent all of Buffalo Grove

Represent part of Buffalo Grove

Each represents the part of Buffalo Grove inside their district. Under each is how many people lived in that part at the 2020 Census, of 43,212 in all.

Buffalo Grove's districts (11)

U.S. House (3)

Illinois Senate (4)

Illinois House (4)

Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–2024; towns and counties from the 2020 Census, 119th Congressional District and 2024 state legislative district tabulation. Figures rounded by us. Retrieved 2026-10-19. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.