Turnbull may refer to:
- People
- See Turnbull (surname)
- Places
- Turnbull High School in Bishopbriggs, Scotland
- Turnbull National Wildlife Refuge, located near Spokane, Washington, USA.
- Turnbull railway station in Manitoba, Canada
- Turnbull River, a river located on the West Coast of New Zealand's South Island.
- Turnbull School
- Turnbull Stakes
- Mount Turnbull, Antarctica, Named after W.L. Turnbull, radio supervisor at Mawson Station in 1965.
- Mount Turnbull, Arizona, USA
- Mount Turnbull, British Columbia (Sonora Island), Canada
- Other
- Clan Turnbull, Scottish clan
- Jack Turnbull Award, award given yearly to the top attackman in NCAA lacrosse