Karl Kenneth Homuth (December 12, 1893 – March 15, 1951) was an Ontario manufacturer and political figure.
He was born in Preston, Ontario, the son of Otto Homuth and Charlotte McDowell, and was educated there and in Galt. He joined George Pattinson's textile manufacturing company in 1910. In 1917, he left that firm to work in his father's company, taking over its operation in 1928 after his father's death. In 1914, he married Minnie A. Rahn. Homuth served on the town council for Preston from 1917 to 1919. He died of complications of lung cancer in his Ottawa home on March 15, 1951.
Homuth's father was a Liberal and Karl defied him by running as a Labour candidate in the 1919 provincial election, was elected as the Member for Waterloo South and supported the United Farmers of Ontario-Labour government of E.C. Drury. He was one of the few Labour MLAs who survived the 1923 provincial election that routed Drury's government and was the only Labour MLA returned in the 1926 provincial election in which he broke with his colleagues in what by then was known as the Progressive Party over the issue of .
Homuth supported Conservative Premier George Howard Ferguson's proposal to liberalise Ontario's prohibition laws during the 1926 election in which liquor policy was the principal issue (the Conservatives consequently did not run a candidate against him) and continued to support Ferguson's government after the election ultimately joining the Tories and successfully running for re-election as a Conservative in the 1929 provincial election before resigning in 1930 to unsuccessfully seek the federal seat of Waterloo North for the federal Conserviates. He went on to sit in Canadian House of Commons from 1938 to 1951 representing Waterloo South for the Conservative Party of Canada, then National Government and finally Progressive Conservative member. Homuth died in office in 1951.