William Marshall Gallant (January 20, 1915 – July 21, 1988) was an air force officer, credit union manager and political figure in Prince Edward Island.
He was born in Saint Charles, Prince Edward Island, the son of Leo Gallant, and was educated in New Acadia.
Gallant served 25 years in the Royal Canadian Air Force.
After he retired from the air force, he became manager of the credit union at CFB Summerside.
Gallant died at the Victoria Health Centre in Fredericton at the age of 73.