Keith Cosens (July 7, 1932 in Teulon, Manitoba – April 27, 1990) was a politician in Manitoba, Canada. He was a Progressive Conservative member of the Legislative Assembly of Manitoba from 1977 to 1981, and served as a cabinet minister in the government of Sterling Lyon.
Cosens was educated at the University of Manitoba, and was vice-principal of Stonewall Collegiate in Stonewall, Manitoba before entering politics. He was elected to the Manitoba legislature in the 1977 election, defeating New Democrat George Schreyer by 720 votes in the riding of Gimli. On October 24, 1977, he was named Minister of Education and Minister of Continuing Education and Manpower in Lyon's government. He was dropped from the latter position on April 1, 1978, but retained the former throughout Lyon's tenure as Premier.
In the provincial election of 1981, he lost to NDP candidate John Bucklaschuk by 730 votes. He did not seek a return to politics after this time.
A street in Stonewall, Manitoba has been named after him.