4th Illinois Volunteer Infantry Regiment
| 4th Regiment of Illinois Volunteers 4th Illinois Volunteer Infantry Regiment | |
|---|---|
Illinois flag | |
| Active | July 1846 – May 1847 1898–1899 |
| Country | United States |
| Branch | Infantry |
| Engagements | Mexican–American War Spanish–American War |
4th Illinois Volunteer Infantry Regiment was an infantry regiment of the United States Volunteers that served in the United States Army during the Mexican–American War and Spanish–American War.