Blewitt may refer to several things:
- An alternate spelling of blewit, the common name of several edible mushrooms of the genus Clitocybe.
- The surname Blewitt. Several notable individuals have this surname, including:
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- Brett Blewitt (b. 1976), Australian actor
- Charles Blewitt (cricketer), English cricketer
- Darren Blewitt (b. 1985), English footballer
- Joe Blewitt (1895-1954), British athlete
- Simon Blewitt (AKA Sam Blue), English rock singer
- See also Greg Blewett, Australian cricketer
- Several place names include the name Blewitt. These include:
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- Blewitt Springs, Adelaide, Australia
- Blewitt Falls Lake, an alternate spelling of Blewett Falls Lake
- Hinton Blewitt, England