John C. Koch

John C. Koch (October 18, 1841 – September 9, 1907) was a Republican politician who served two terms as mayor of Milwaukee, Wisconsin.

Koch was born in 1841 near Hamburg, Germany. He moved with his family to Milwaukee in 1854. He became a tinner in his father's shop, Later he gained employment at John Pritzlaff Hardware Company and went on to become an executive there.

Koch received his party's nomination for lieutenant-governor in 1892. He was instead elected mayor of Milwaukee in that year, and was reelected to a second two-year term in 1894. His first term saw the Panic of 1893.

In 1864, he married John C. Pritzlaff's daughter, Elizabeth, and they went on to have 6 sons and 3 daughters.