Congressional district · Boundaries of the 119th Congress

Illinois's 1st district

Illinois's 1st district has 736,687 residents on 612 mi² of land. It is represented by Jonathan L. Jackson (D-IL-1). Federal contract obligations attributed to it reached $75.5M in FY2026.

Residents
736,687
Land area
612 mi²
Counties
3
Representative
Jonathan L. Jackson
Open in the Congress explorer
Map of Illinois's 1st 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 County68% of the district · 9.7% of the county
  2. Will County27% of the district · 29% of the county
  3. Kankakee County4.6% of the district · 32% 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
$75.5M
Per resident
$103
Rank in Illinois
16 of 17
Contract actions
3,542
New awards: 2,772

By fiscal year

  1. 97.7MFY2017
  2. 127.6MFY2018
  3. 117.7MFY2019
  4. 118.7MFY2020
  5. 92.7MFY2021
  6. 108.2MFY2022
  7. 109.9MFY2023
  8. 74.5MFY2024
  9. 64.2MFY2025
  10. 75.5MFY2026

Top buyers

  1. Centers for Medicare and Medicaid Services$16.6M22%
    Department of Health and Human Services
  2. Defense Logistics Agency$12.9M17%
    Department of Defense
  3. Department of the Navy$8.7M12%
    Department of Defense
  4. Department of the Army$6.9M9.1%
    Department of Defense
  5. National Institutes of Health$5.2M6.9%
    Department of Health and Human Services
  6. Department of Veterans Affairs$4.2M5.6%
  7. National Science Foundation$3.5M4.7%
  8. U.S. Customs and Border Protection$2.5M3.3%
    Department of Homeland Security

Top recipients

  1. NATIONAL OPINION RESEARCH CENTER$23.1M31%
    5 awards
  2. CONSUMER CAPITAL GROUP CORP.$8.4M11%
    1 award
  3. ALLIED TUBE & CONDUIT CORPORATION$6.2M8.2%
    17 awards
  4. J. F. BRENNAN COMPANY, INC.$3.9M5.2%
    2 awards
  5. OPTIPLEX LLC$3.9M5.1%
    322 awards
  6. MOTOROLA SOLUTIONS, INC.$2.5M3.3%
    1 award
  7. THE UNIVERSITY OF CHICAGO$1.8M2.4%
    15 awards
  8. INTEGRITY FEDERAL SERVICES, INC$1.7M2.3%
    1 award
  9. ARCUS GROUP, LLC$1.6M2.1%
    1 award
  10. INDUSTRIA INC$1.3M1.7%
    1 award

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.