The 70th Regiment, Illinois Volunteer Infantry, was an infantry regiment that served in the Union Army during the American Civil War.

The 70th Regiment was organized at Camp Butler, Illinois and mustered into Federal service on July 4, 1862, for a term of three months.

The regiment was assigned to Camp Butler, where it guarded prisoners, and mustered out on October 23, 1862.

The 70th Regiment suffered 19 enlisted men who died of disease, for a total of 19 fatalities.

This article about a specific military unit of the American Civil War is a stub.