Government Contracting in Illinois
Explore the federal contracting landscape in Illinois. Discover active contractors, trending industries, and key government agencies awarding contracts in the state.
Small Business
69%
2,662 of 3,838
Top Industries in Illinois
Most common NAICS codes among Illinois contractors
No NAICS data available.
Browse all NAICS codesTop Buying Agencies in Illinois
Federal agencies with the most contract activity in IL (FY2025)
- 1Department of Defense285 awards
- 2Department of Veterans Affairs106 awards
- 3Department of Energy40 awards
- 4Department of Agriculture20 awards
- 5Department of Health and Human Services19 awards
- 6General Services Administration10 awards
- 7Department of Homeland Security5 awards
- 8Department of Transportation3 awards
- 9Department of Commerce3 awards
- 10Department of the Interior2 awards
Top Federal Contractors in Illinois
Highest-volume contractors headquartered in Illinois by total obligations
| Company | City | Size | Total Obligations | Transactions |
|---|---|---|---|---|
| UCHICAGO ARGONNE, LLC | CHICAGO | Large | $5.0B | 175 |
| W S DARLEY & CO | ITASCA | Small | $4.1B | 14,710 |
| NORTHROP GRUMMAN SYSTEMS CORPORATION DBA: SPERRY MARINE DIVISION | ROLLING MEADOWS | Large | $3.5B | 2,213 |
| BP PRODUCTS NORTH AMERICA INC. | CHICAGO | Large | $2.9B | 678 |
| HII MISSION TECHNOLOGIES CORP | BURR RIDGE | Large | $2.6B | 2,932 |
| FERMI FORWARD DISCOVERY GROUP, LLC | CHICAGO | Large | $2.3B | 55 |
| CARDINAL HEALTH 200, LLC | WAUKEGAN | Large | $2.2B | 1,069,350 |
| SUPPLYCORE LLC | ROCKFORD | Large | $2.2B | 153,453 |
| MEDLINE INDUSTRIES, LP DBA: MEDLINE | NORTHFIELD | Large | $2.1B | 6,049 |
| WALSH FEDERAL LLC DBA: WALSH CONSTRUCTION CO II, LLC | CHICAGO | Large | $1.6B | 595 |
Contractor Certifications in Illinois
Recent Contract Awards in Illinois
75F40123C00186
Department of Health and Human Services
NAICS: 541714 | Dec 4, 2025
$0
20342324F00018
Department of the Treasury
NAICS: 311999 | Dec 4, 2025
$175K
15B40926F00000010
Department of Justice
NAICS: 221122 | Dec 4, 2025
$52K
36C24825N0735
Department of Veterans Affairs
NAICS: 334516 | Dec 4, 2025
$-57K
15B41325F00000195
Department of Justice
NAICS: 334519 | Dec 4, 2025
$73.36
Find Active Contracts in Illinois
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