William Logan may refer to:
- William Edmond Logan, Canadian geologist
- William Logan (Kentucky), U.S. Senator from Kentucky
- William Logan (poet), U.S. poet and critic
- William Logan (Malabar Manual), Scottish author of Malabar Manual
- William F. Logan, see List of mayors of Williamsport, Pennsylvania
- Willie Logan (Loganair), Scottish construction contractor, founder of Loganair
- Willie Logan (born 1957), American politician
- William Logan (temperance campaigner), Scottish missionary and temperance activist