William Floyd Gilliland (December 17, 1890 – September 5, 1961) was a politician from Alberta, Canada.
He served in the Legislative Assembly of Alberta from 1944 until his death in 1961, as a member of the governing Social Credit caucus.
Gilliland was a farmer in the Peace River district for thirty years before running for public office.
He was nominated as the Social Credit candidate in Peace River on the second count at a convention held in Grimshaw, Alberta on March 2, 1944.
[7] Gilliland suffered a heart attack at the 1961 Social Credit national convention in Ottawa.