Herman Kroeger (December 16, 1831 – June 20, 1916) was a German American immigrant, dry goods merchant, and politician.
He served a four-year term in the Wisconsin State Senate representing the south side of the city of Milwaukee.
He was elected as a Democrat, but was affiliated with Wisconsin's socialist Union Labor Party for part of his Senate term.
Radical Socialist Labor Party candidate Colin Campbell, backed by Paul Grottkau (imprisoned editor of the Arbeiter-Zeitung) garnered 964 votes, just enough to keep Kroeger from winning if they had gone to him instead.
By the time of the printing of the 1889 Wisconsin Blue Book, however, his party affiliation was listed as "Union Labor".