| Item | Obligations |
|---|---|
| Department of Defense | $5.9B |
| Department of Veterans Affairs | $1.9B |
| Department of Energy | $1.9B |
| General Services Administration | $533M |
| Department of Agriculture | $255M |
| Department of Health and Human Services | $242M |
| Department of Homeland Security | $125M |
| Department of Justice | $102M |
| Department of Labor | $39.8M |
| Environmental Protection Agency | $36.4M |
Department of Defense was the top federal buyer in Illinois, obligating $5.9B (52.6% of the state total).