Largest Federal Contractors in Illinois 2026
Illinois has 59 federal contractors that received $10.4B across 719 contract awards. The largest contractor is Optum Public Sector Solutions, Inc. at $119.0M.
Top 10 Contractors in Illinois
| # | Contractor | Federal Obligations |
|---|---|---|
| 1 | Optum Public Sector Solutions, Inc. | $119.0M |
| 2 | Lockheed Martin Corporation | $99.4M |
| 3 | Mckesson Corporation | $53.2M |
| 4 | The Boeing Company | $50.8M |
| 5 | Electric Boat Corporation | $50.7M |
| 6 | Triwest Healthcare Alliance Corp. | $49.5M |
| 7 | Humana Government Business Inc. | $47.5M |
| 8 | Raytheon Company | $45.8M |
| 9 | Huntington Ingalls Incorporated | $44.0M |
| 10 | Booz Allen Hamilton Inc. | $40.9M |
Top Federal Agencies Spending in Illinois
| Agency | Spending |
|---|---|
| Department of Defense | $5.7B |
| Department of Health and Human Services | $1.6B |
| Department of Veterans Affairs | $834.6M |
| Department of Energy | $626.0M |
| General Services Administration | $417.3M |
Federal contract data for Illinois is sourced from USASpending.gov, the official open data source for U.S. federal government spending.
Frequently Asked Questions
Optum Public Sector Solutions, Inc. is the largest federal contractor in Illinois with $119.0M in federal obligations.
Illinois received $10.4B in federal contracts across 719 awards to 59 contractors.
All federal spending data is sourced from USASpending.gov, the official source for U.S. government spending data. This includes contracts, grants, loans, and other financial assistance.
Contractors ranked by total federal obligation amount. Data includes contracts, grants, loans, and direct payments.