The 20th Wisconsin Infantry Regiment was a volunteer infantry regiment that served in the Union Army during the American Civil War.

[1][2] The 20th Wisconsin was organized at Madison, Wisconsin, and mustered into Federal service August 23, 1862.

[2][3] The regiment was mustered out on July 14, 1865, at Galveston, Texas.

[2][3] The 20th Wisconsin suffered 5 officers and 100 enlisted men killed in action or who later died of their wounds, plus another 1 officer and 145 enlisted men who died of disease, for a total of 251 fatalities.

[1][2][3]