142nd Illinois Volunteer Infantry Regiment

142nd Regiment Illinois Volunteer Infantry
Illinois state flag
Active	June 18, 1864, to October 27, 1864
Country	United States
Allegiance	Union
Branch	Infantry

The 142nd Regiment Illinois Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War. It was among scores of regiments that were raised in the summer of 1864 as Hundred Days Men, an effort to augment existing manpower for an all-out push to end the war within 100 days.

The 142nd Illinois Infantry was organized at Freeport, Illinois, and mustered into Federal service on June 18, 1864, for a one-hundred-day enlistment. The 142nd served in garrisons in the Memphis, Tennessee, area.

The regiment was mustered out of service on October 27, 1864.

The regiment suffered 30 enlisted men who died of disease, for a total of 30 fatalities.