Blewett is a surname. Notable people with the surname include:
Alexander (Zander) Blewett, III (b. 1945), US lawyer
Anders Blewett (b. 1980), US politician
Bob Blewett (1877–1958), US baseball player
George Blewett (1873–1912), Canadian academic and philosopher
Greg Blewett (b. 1971), Australian cricketer
Jean Blewett (1862–1934), Canadian writer
Jimmy Blewett (b. 1980), US NASCAR driver
Joan Warnow-Blewett (1931–2006), American archivist
John Blewett III (1973–2007), US NASCAR driver
Kate Blewett (fl. 1990s-present), British documentary filmmaker
Kerry Blewett (b. 1986), British life guard
Mary Blewett (b. 1938), US author and historian
Neal Blewett (b. 1933), Australian politician and political science academic
