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City in LaSalle County, Illinois

Marseilles

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

Who lives in Marseilles

Census survey estimates for 2020 to 2024, rounded.

People

Population
4,300
Median age
41.4 years
Under 18
23%
65 and over
19%
Veterans, of adults
9%
Speak another language at home
6%

Race and ethnicity

Hispanic or Latino, of any race
5%
White, not Hispanic
86%
Black, not Hispanic
0%
Asian, not Hispanic
4%

Income and housing

Median household income
$58,200
Below the poverty line
22%
Bachelor's or higher, adults 25+
24%
Owner-occupied homes
69%
Median home value
$143,000

2024 vote for president

Not counted for Marseilles on its own: its precincts follow township lines, not the town’s. See the figure for LaSalle County.

Represent all of Marseilles

Represent part of Marseilles

Each represents the part of Marseilles inside their district. Under each is how many people lived in that part at the 2020 Census, of 4,845 in all.

Marseilles's districts (7)

U.S. House (2)

Illinois Senate (2)

Illinois House (3)

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.