119th Congress · IL-12
Illinois's 12th Congressional District
Illinois's 12th Congressional District (IL-12) has a population of 748,190. The median household income is $66,758 and the median age is 41.4.
748,190
Population
53
People / sq mi
$66,758
Median Income
41.4
Median Age
IL-12 covers 14,016 sq mi of land at 53.4 people per square mile.
Race & Ethnicity
| White | 88.6% |
| Black or African American | 4.9% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.6% |
Economy & Income
$66,758
Median Household Income
$36,072
Per Capita Income
8.7%
Poverty Rate
2.7%
Unemployment
Housing
$140,200
Median Home Value
$807
Median Rent
74.9%
Homeownership
Education
91.2%
High School+
24.1%
Bachelor's+
Other Illinois Congressional Districts
Largest cities in Illinois
Largest counties in Illinois
State rankings
Frequently Asked Questions
Illinois's 12th Congressional District (IL-12) has a population of 748,190 according to the latest Census ACS 5-Year estimates. Each US Congressional District is drawn to be roughly equal in population (~760K people).
The median household income in Illinois's 12th Congressional District is $66,758, with a per capita income of $36,072.
Illinois's 12th Congressional District is 88.6% White, 4.9% Black, 0.0% Asian, and 1.6% Hispanic or Latino, per Census ACS data.
More from Illinois
Data for Illinois's 12th Congressional District (119th Congress) from the American Community Survey 5-Year estimates. Land area from the Census Gazetteer files. Congressional districts are redrawn after each decennial Census; the 119th Congress (current) uses post-2020 boundaries.
For this entity, the underlying data on this page comes from the U.S. Census Bureau ACS and decennial files. The breakdown above is the federal record; the paragraphs below add the per-entity context that makes the headline numbers usable for a real decision rather than just a data lookup.
The methodology behind every numeric value on this page is publicly documented on the the U.S. Census Bureau ACS and decennial files portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for this entity is typically a peer within U.S. states, metros, cities, and ZIPs with similar size, similar exposure, or similar geography — not the national-level summary alone.
Source: U.S. Census Bureau ACS, 2026.