37th Illinois Volunteer Infantry Regiment

37th Regiment Illinois Volunteer Infantry "Fremont Rifles"
Illinois state flag
Active	September 18, 1861 to May 15, 1866
Country	United States
Allegiance	Union
Branch	Infantry
Engagements	Battle of Pea Ridge Battle of Prairie Grove Siege of Vicksburg

The 37th Regiment Illinois Volunteer Infantry, nicknamed the "Fremont Rifles" and "Illinois Greyhounds", was an infantry regiment that served in the Union Army during the American Civil War.

The 37th Illinois Infantry was organized at Chicago, Illinois and mustered into Federal service on September 18, 1861.

The Regiment suffered casualties of the 54 members of Company A: 5 killed, 4 mortally wounded and 24 wounded.

The regiment was mustered out on May 15, 1866.

The regiment suffered 7 officers and 91 enlisted men who were killed in action or who died of their wounds and 5 officers and 164 enlisted men who died of disease, for a total of 267 fatalities.