4th Illinois Volunteer Infantry Regiment

4th Illinois Volunteer Infantry Regiment was an infantry regiment that served in the United States Army during the Mexican–American War and Spanish-American War.

Service
During the Mexican–American War the regiment was known as the 4th Regiment of Illinois Volunteers and was raised for 12 months (July 1846 – May 1847). It was under the command of Colonel Edward D. Baker.

During the Spanish-American War the regiment served as part of the occupation forces in Cuba. It was mustered in on 19–20 May 1898 at Springfield, Illinois, and was mustered out on 2 May 1899 at Augusta, Georgia.