Congressional district · Boundaries of the 119th Congress

Illinois's 15th district

Illinois's 15th district has 755,272 residents on 16,753 mi² of land. It is represented by Mary E. Miller (R-IL-15). Federal contract obligations attributed to it reached $43.3M in FY2026.

Residents
755,272
Land area
16,753 mi²
Counties
35
Representative
Mary E. Miller
Open in the Congress explorer
Map of Illinois's 15th 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. Madison County11% of the district · 31% of the county
  2. Adams County8.6% of the district · 100% of the county
  3. Macon County7.1% of the district · 52% of the county
  4. Sangamon County6.1% of the district · 23% of the county
  5. Champaign County5.3% of the district · 19% of the county
  6. Coles County4.7% of the district · 75% of the county
  7. Christian County4.4% of the district · 100% of the county
  8. Morgan County4.4% of the district · 100% of the county
  9. Montgomery County3.7% of the district · 100% of the county
  10. Logan County3.7% of the district · 100% of the county
  11. Fayette County2.8% of the district · 100% of the county
  12. Jersey County2.8% of the district · 100% of the county
  13. Shelby County2.7% of the district · 100% of the county
  14. Douglas County2.6% of the district · 100% of the county
  15. Hancock County2.3% of the district · 100% of the county
  16. Bond County2.2% of the district · 100% of the county
  17. Edgar County2.2% of the district · 100% of the county
  18. De Witt County2.0% of the district · 100% of the county
  19. McDonough County2.0% of the district · 57% of the county
  20. Pike County1.9% of the district · 100% of the county
  21. Moultrie County1.9% of the district · 100% of the county
  22. Cass County1.7% of the district · 100% of the county
  23. Mason County1.7% of the district · 100% of the county
  24. Menard County1.6% of the district · 100% of the county
  25. Greene County1.5% of the district · 100% of the county
  26. Mercer County1.3% of the district · 64% of the county
  27. Vermilion County1.3% of the district · 13% of the county
  28. Fulton County1.1% of the district · 25% of the county
  29. Schuyler County0.9% of the district · 100% of the county
  30. Warren County0.9% of the district · 40% of the county
  31. Piatt County0.8% of the district · 38% of the county
  32. Brown County0.8% of the district · 100% of the county
  33. Henderson County0.8% of the district · 100% of the county
  34. Scott County0.7% of the district · 100% of the county
  35. Calhoun County0.6% of the district · 100% 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
$43.3M
Per resident
$57.31
Rank in Illinois
17 of 17
Contract actions
778
New awards: 384

By fiscal year

  1. 67.6MFY2017
  2. 45.8MFY2018
  3. 156MFY2019
  4. 100.6MFY2020
  5. 64.6MFY2021
  6. 131.3MFY2022
  7. 122.9MFY2023
  8. 87.7MFY2024
  9. 73.8MFY2025
  10. 43.3MFY2026

Top buyers

  1. Agricultural Marketing Service$17.9M41%
    Department of Agriculture
  2. Department of the Army$12.7M29%
    Department of Defense
  3. Federal Prison System / Bureau of Prisons$4.7M11%
    Department of Justice
  4. Department of Veterans Affairs$1.7M4.0%
  5. National Aeronautics and Space Administration$1.5M3.4%
  6. Federal Aviation Administration$913.9K2.1%
    Department of Transportation
  7. Defense Logistics Agency$766.8K1.8%
    Department of Defense
  8. Office of Procurement Operations$444.7K1.0%
    Department of Homeland Security

Top recipients

  1. IMT DEFENSE CORP$10.4M24%
    2 awards
  2. JANCORP, LLC$10.2M24%
    5 awards
  3. MAINSTAY DISTRIBUTING, LLC$7.6M18%
    10 awards
  4. NAPHCARE LLC$3.5M8.2%
    44 awards
  5. AIR CONTROL, INC.$1.5M3.5%
    1 award
  6. HINETICS LLC$1.3M3.0%
    3 awards
  7. DEPARTMENT OF PUBLIC HEALTH ILLINOIS$940.4K2.2%
    8 awards
  8. JACOBS ENGINEERING GROUP INC.$814.8K1.9%
    1 award
  9. KOBO UTILITY CONSTRUCTION CORP.$667.6K1.5%
    1 award
  10. STARFIRE INDUSTRIES LLC$553.2K1.3%
    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.