The 28th Wisconsin Infantry Regiment was a volunteer infantry regiment that served in the Union Army during the American Civil War.

The 28th Wisconsin was organized at Milwaukee, Wisconsin, and mustered into Federal service October 14, 1862.

Six companies were from Waukesha County, Wisconsin, four companies were from Walworth County, Wisconsin.

The 28th Wisconsin suffered 1 officer and 12 enlisted men killed in action or who later died of their wounds, plus another 6 officers and 221 enlisted men who died of disease, for a total of 240 fatalities.

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