Fergus may refer to:
People:
- Fergus (name), including people with either the given or family name
Places:
- Fergus, Ontario, Canada
- Fergus, California, United States, an unincorporated community
- Fergus County, Montana, United States
- River Fergus, County Clare, Ireland
- Lake Fergus, South Island, New Zealand
- Loch Fergus, South Ayrshire, Scotland
Other uses:
- Cyclone Fergus, in the 1996–97 South Pacific cyclone season
- USS Fergus (APA-82), a US Navy attack transport ship
- Fergus (novel), by Brian Moore