Watrous is a surname. Notable people with the surname include:
- Al Watrous (1899–1983), American golfer
- Ansel Watrous (1835–1927), American newspaper editor and historian
- Bill Watrous (1939–2018), American jazz trombonist
- Harry W. Watrous (1857–1940), American painter
- James Watrous (1908–1999), American painter
- Jerome Anthony Watrous (1840–1922), American author, soldier, newspaper editor, and politician
- John Watrous (disambiguation), multiple people
- Malena Watrous, American writer and educator
- Mark Watrous, American singer, songwriter, multi-instrumentalist and graphic/video artist