Lieutenant Frederick Clayton Casselman (October 2, 1885 – March 20, 1941) was a soldier, barrister, teacher, as well as a Canadian municipal and federal level politician.
He held his aldermanic post until he resigned in 1940 to run for the House of Commons of Canada.
Casselman ran in the 1940 Canadian federal election in the Edmonton East as a candidate for the Liberal Party of Canada.
Casselman died a year into his first term in office on March 20, 1941, at age 55.
His wife Cora Taylor Casselman won election in his place in the subsequent by-election.