Congressional district · Boundaries of the 119th Congress

Illinois's 6th district

Illinois's 6th district has 748,960 residents on 225 mi² of land. It is represented by Sean Casten (D-IL-6). Federal contract obligations attributed to it reached $85.2M in FY2026.

Residents
748,960
Land area
225 mi²
Counties
2
Representative
Sean Casten
Open in the Congress explorer
Map of Illinois's 6th district within Illinois

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.

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).

  1. Cook County59% of the district · 8.5% of the county
  2. 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
$85.2M
Per resident
$114
Rank in Illinois
15 of 17
Contract actions
3,107
New awards: 2,099

By fiscal year

  1. 414.3MFY2017
  2. 519.3MFY2018
  3. 211MFY2019
  4. 171.5MFY2020
  5. 187.6MFY2021
  6. 135.4MFY2022
  7. 131.7MFY2023
  8. 130.9MFY2024
  9. 158.8MFY2025
  10. 85.2MFY2026

Top buyers

  1. Department of Energy$27.8M33%
  2. Department of the Air Force$12.6M15%
    Department of Defense
  3. Defense Logistics Agency$10.2M12%
    Department of Defense
  4. Department of Veterans Affairs$9.3M11%
  5. Department of the Navy$6.5M7.6%
    Department of Defense
  6. Defense Health Agency$3.7M4.3%
    Department of Defense
  7. Internal Revenue Service$2.6M3.1%
    Department of the Treasury
  8. Bureau of the Fiscal Service$2.6M3.1%
    Department of the Treasury

Top recipients

  1. UCHICAGO ARGONNE, LLC$27.8M33%
    1 award
  2. MCCRONE ASSOCIATES INC$9.9M12%
    8 awards
  3. JOINT COMMISSION ON ACCREDITATION OF HEALTHCARE ORGANIZATIONS$9.8M11%
    11 awards
  4. CHEMRING ENERGETIC DEVICES INC$7.6M8.9%
    43 awards
  5. BURHANI ENTERPRISES INC$5.1M6.0%
    993 awards
  6. CONSUMER CAPITAL GROUP CORP.$2.7M3.1%
    1 award
  7. FIS CAPITAL MARKETS US LLC$2.6M3.0%
    1 award
  8. MOTOROLA SOLUTIONS, INC.$2.2M2.6%
    1 award
  9. GATEWAY CABLE INC$2.2M2.5%
    8 awards
  10. 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 3, 2026 · loaded Oct 3, 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.