Congressional district · Boundaries of the 119th Congress
Illinois's 11th district
Illinois's 11th district has 753,885 residents on 919 mi² of land. It is represented by Bill Foster (D-IL-11). Federal contract obligations attributed to it reached $2B in FY2026.
- Residents
- 753,885
- Land area
- 919 mi²
- Counties
- 8
- Representative
- Bill Foster
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).
- DuPage County30% of the district · 24% of the county
- Kane County29% of the district · 42% of the county
- McHenry County21% of the district · 52% of the county
- Will County11% of the district · 11% of the county
- Boone County3.6% of the district · 51% of the county
- Lake County2.7% of the district · 2.9% of the county
- DeKalb County1.4% of the district · 11% of the county
- Cook County1.4% of the district · 0.2% 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
- $2B
- Per resident
- $2,676
- Rank in Illinois
- 2 of 17
- Contract actions
- 4,890
- New awards: 4,114
By fiscal year
- 1.3BFY2017
- 1.7BFY2018
- 1.6BFY2019
- 1.8BFY2020
- 1.7BFY2021
- 2BFY2022
- 2.1BFY2023
- 2.1BFY2024
- 2.2BFY2025
- 2BFY2026
Top buyers
- Department of Energy$1.9B93%
- Department of Veterans Affairs$92.7M4.6%
- Department of the Navy$17.2M0.9%Department of Defense
- Defense Logistics Agency$14M0.7%Department of Defense
- Department of Health and Human Services
- Federal Aviation Administration$1.6M0.1%Department of Transportation
- Department of the Army$1.6M0.1%Department of Defense
- Offices, Boards and Divisions$1.5M0.1%Department of Justice
Top recipients
- UCHICAGO ARGONNE, LLC$1.2B57%1 award
- FERMI FORWARD DISCOVERY GROUP, LLC$727.6M36%1 award
- SONOVA USA INC$91.5M4.5%18 awards
- EVAC NORTH AMERICA INC$16.5M0.8%710 awards
- ARGENTUM MEDICAL, LLC$3.2M0.2%3 awards
- 694 awards
- RADCO INDUSTRIES INC$2.2M0.1%57 awards
- BALLCO MANUFACTURING COMPANY, INC.$1.7M0.1%55 awards
- WEST PUBLISHING CORPORATION$1.4M0.1%4 awards
- ENGINEERING SYSTEMS INC$1.3M0.1%19 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.