Dundas may refer to:
- Places
- Dundas, Greenland, a former settlement also known as Uummannaq and since replaced by Thule Air Base
- Dundas, Minnesota, United States
- Dundas, New Brunswick, Canada
- Dundas, New South Wales, Australia
- Dundas, Ontario, Canada
- Dundas, Tasmania, Australia
- Dundas, Virginia, United States
- Dundas, Wisconsin, United States
- Dundas (TTC), a subway station in Toronto, Ontario, Canada
- Dundas Aqueduct, Wiltshire, England
- Dundas Cactus Festival, Dundas, Ontario, Canada
- Dundas County, Ontario, Canada
- Dundas Square, a public square in downtown Toronto, Canada
- Dundas Street, Hong Kong
- Dundas Street, Toronto, Ontario
- Shire of Dundas, Western Australia
- Dundas Island (British Columbia), Canada, the largest of the Dundas Islands
- Dundas Island (Nunavut), Canada
- Dundas Island, New Zealand
- Dundas, Western Australia, Australia
- People
- See: Dundas (surname)
- Things
- Dundas Castle, castle near Edinburgh
- Clan Dundas, a Scottish clan
- Charlotte Dundas, the first practical steamboat
- Dundas Data Visualization, Inc., A commercial Software company from Ontario, Canada.