Congressional district · Boundaries of the 118th Congress
Illinois's 6th district
Illinois's 6th district has 748,960 residents on 225 mi² of land. Sean Casten (D-IL-6) held the seat last under these boundaries. Federal contract obligations attributed to it reached $85.3M in FY2026.
These are the boundaries of the 118th Congress. The newest boundaries of this district are on its main page. See the newest boundaries
- Residents
- 748,960
- Land area
- 225 mi²
- Counties
- 2
- Representative
- Sean Casten
Members for this district
Members who held this seat while these boundaries were in force, newest first.
Senators
The state's senators today, or on the last day of these boundaries for an older plan.
Tammy DuckworthD-IL
Counties
Share of the district's residents living in each county, and share of the county's residents living in the district (2020 census tracts weighted by their overlap).
- Cook County59% of the district · 8.5% of the county
- DuPage County41% of the district · 33% of the county
Federal contracts
Contract obligations attributed to the district by each action's county and its award's ZIP code (land shares through census tracts); an estimate where ZIP codes cross district lines.
- Obligations · FY2026
- $85.3M
- Per resident
- $114
- Rank in Illinois
- 15 of 17
- Contract actions
- 3,118
- New awards: 2,105
By fiscal year
- 414.3MFY2017
- 519.3MFY2018
- 211MFY2019
- 171.5MFY2020
- 187.6MFY2021
- 135.4MFY2022
- 131.7MFY2023
- 130.9MFY2024
- 158.8MFY2025
- 85.3MFY2026
Top buyers
- Department of Energy$27.8M33%
- Department of the Air Force$12.6M15%Department of Defense
- Defense Logistics Agency$10.2M12%Department of Defense
- Department of Veterans Affairs$9.3M11%
- Department of the Navy$6.5M7.6%Department of Defense
- Defense Health Agency$3.7M4.3%Department of Defense
- Internal Revenue Service$2.6M3.1%Department of the Treasury
- Bureau of the Fiscal Service$2.6M3.1%Department of the Treasury
Top recipients
- UCHICAGO ARGONNE, LLC$27.8M33%1 award
- MCCRONE ASSOCIATES INC$9.9M12%8 awards
- 11 awards
- CHEMRING ENERGETIC DEVICES INC$7.6M8.9%43 awards
- BURHANI ENTERPRISES INC$5.1M6.0%997 awards
- CONSUMER CAPITAL GROUP CORP.$2.7M3.1%1 award
- FIS CAPITAL MARKETS US LLC$2.6M3.0%1 award
- MOTOROLA SOLUTIONS, INC.$2.2M2.6%1 award
- GATEWAY CABLE INC$2.2M2.5%8 awards
- WEST PUBLISHING CORPORATION$2M2.3%4 awards
Other boundaries
District lines change between plans; each plan keeps its own page.
Sources and method
Every figure on this page traces to these records.
- Congressional district boundaries and relationship files (U.S. Census Bureau)U.S. Census Bureau, Cartographic Boundary Files (congressional districts) and 2020 relationship files · release cd116+cd118+cd119 · loaded Oct 3, 2026 · license: Public domain (U.S. Government work, 17 U.S.C. § 105)
- Members of Congress, their terms, committees and identifiers (The @unitedstates project (from the Biographical Directory of the U.S. Congress, the House and the Senate))unitedstates/congress-legislators: legislators, committees and current committee membership · data current to Oct 3, 2026 · loaded Oct 3, 2026 · license: CC0 1.0 (public domain dedication)
- ZIP code (ZCTA) to congressional district crosswalk (U.S. Census Bureau)U.S. Census Bureau, 2020 relationship files (ZCTAs, tracts and congressional districts); shares computed by Analisa · release 2020 · loaded Oct 3, 2026 · license: Public domain (U.S. Government work, 17 U.S.C. § 105)
- Federal contract transactions (Federal Procurement Data System) (U.S. Department of the Treasury, USAspending.gov)USAspending.gov, prime award contract transactions (FPDS) · data current to Oct 9, 2026 · loaded Oct 9, 2026 · license: Public domain (U.S. Government work, 17 U.S.C. § 105)
- Money and votes are shown side by side; neither explains the other.