Congressional district · Boundaries of the 118th Congress

Illinois's 16th district

Illinois's 16th district has 772,916 residents on 8,914 mi² of land. Darin LaHood (R-IL-16) held the seat last under these boundaries. Federal contract obligations attributed to it reached $502M 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
772,916
Land area
8,914 mi²
Counties
21
Representative
Darin LaHood
Open in the Congress explorer
Map of Illinois's 16th 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. Winnebago County17% of the district · 48% of the county
  2. Tazewell County15% of the district · 90% of the county
  3. McLean County12% of the district · 52% of the county
  4. Peoria County8.2% of the district · 35% of the county
  5. Grundy County6.9% of the district · 100% of the county
  6. Ogle County6.7% of the district · 100% of the county
  7. Woodford County5.0% of the district · 100% of the county
  8. Lee County4.4% of the district · 100% of the county
  9. Henry County3.5% of the district · 56% of the county
  10. Boone County3.3% of the district · 49% of the county
  11. LaSalle County3.3% of the district · 23% of the county
  12. Jo Daviess County2.8% of the district · 100% of the county
  13. Bureau County2.7% of the district · 64% of the county
  14. McHenry County1.9% of the district · 4.7% of the county
  15. Livingston County1.7% of the district · 38% of the county
  16. Marshall County1.5% of the district · 100% of the county
  17. Stephenson County1.5% of the district · 26% of the county
  18. DeKalb County1.0% of the district · 7.9% of the county
  19. Stark County0.7% of the district · 100% of the county
  20. Ford County0.5% of the district · 29% of the county
  21. Putnam County0.3% of the district · 40% 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
$502M
Per resident
$649
Rank in Illinois
6 of 17
Contract actions
31.8K
New awards: 30.1K

By fiscal year

  1. 474.4MFY2017
  2. 605.5MFY2018
  3. 445.7MFY2019
  4. 370.9MFY2020
  5. 325.1MFY2021
  6. 417.2MFY2022
  7. 558.9MFY2023
  8. 675.5MFY2024
  9. 766.8MFY2025
  10. 502MFY2026

Top buyers

  1. Defense Logistics Agency$443.4M88%
    Department of Defense
  2. Federal Acquisition Service$15.3M3.0%
    General Services Administration
  3. Department of the Army$11.4M2.3%
    Department of Defense
  4. Department of the Navy$9.4M1.9%
    Department of Defense
  5. Department of the Air Force$4.6M0.9%
    Department of Defense
  6. Federal Aviation Administration$3.4M0.7%
    Department of Transportation
  7. Federal Prison System / Bureau of Prisons$2.4M0.5%
    Department of Justice
  8. Agricultural Marketing Service$2.3M0.5%
    Department of Agriculture

Top recipients

  1. SUPPLYCORE LLC$419.3M84%
    26,010 awards
  2. HAMILTON SUNDSTRAND CORPORATION$26.4M5.3%
    664 awards
  3. WOODWARD, INC.$14.6M2.9%
    29 awards
  4. EVAC NORTH AMERICA INC$8.9M1.8%
    717 awards
  5. PROALLIANCE CORP$3.1M0.6%
    2,018 awards
  6. GE AVIATION SYSTEMS LLC$3.1M0.6%
    91 awards
  7. AHTNA BUILDERS, LLC$2.4M0.5%
    1 award
  8. SENECA FOODS CORP$2.3M0.5%
    2 awards
  9. DCX-CHOL ENTERPRISES, INC.$2M0.4%
    123 awards
  10. AMERICAN WATER OPERATIONS AND MAINTENANCE, LLC$1.9M0.4%
    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 10, 2026 · loaded Oct 10, 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.