McTavish is a surname of Scottish and Irish origin, deriving from a Gaelic form of Thomas meaning “twin”. Notable people with the surname include:
- Bob McTavish (born 1944), Australian surfboard designer
- Bob McTavish (footballer) (1888-1972), Scottish footballer
- Dale McTavish (born 1972), Canadian professional ice hockey player
- Devon McTavish (born 1984), American professional soccer player
- George Archibald McTavish (1856-1886), farmer and politician
- Gord McTavish (born 1954), Canadian professional ice hockey player
- Gordon McTavish (1925–2019), Canadian curler and judge
- Graham McTavish (born 1961), Scottish actor and voice actor
- Jessie McTavish, Scottish nurse convicted in 1974 of murdering a patient with insulin
- John McTavish (footballer, born 1885), Scottish footballer
- John McTavish (footballer, born 1932), Scottish footballer
- John McTavish (politician), Canadian politician
- Mason McTavish (born 2003), Swiss professional ice hockey player
- Megan McTavish (born 1949), American television actress
- Saunders McTavish, pen name of early settler, businessman and politician William Storrie in the colony of South Australia (c. 1832 − 19 June 1900)
- Simon McTavish (1750–1804), Scots-Canadian businessman, fur trader, and philanthropist