Surname
- Brian Brett (born 1950), Canadian writer
- Charles Brett (1928–2005), Northern Irish lawyer
- Charles Brett (MP) (1715–1799), British politician
- Dorothy Brett (1883–1977), British-American painter
- George Brett (baseball) (born 1953), American baseball player, brother of Ken Brett
- George Brett (general) (1886–1963), American general
- George Wendell Brett (1912–2005), American philatelist
- Henry Brett (polo player), English polo player
- Jan Brett (born 1949), American children's writer
- Jasper Brett (1895–1917), Irish rugby player
- Jeremy Brett (1933–1995), British actor
- John Brett (bishop), Bishop of Killala from 1743 to 1748 and Bishop of Elphin from 1748 to 1756
- John Brett (1831–1902), British painter
- Ken Brett (1948–2003), American baseball player
- Laurie Brett (born 1970), British actress
- Paul Brett (born 1947), British guitarist
- Peter V. Brett (born 1973), American writer of fantasy novels
- Philip Brett (1937–2002), American musicologist and conductor
- Philip Milledoler Brett (1871–1960), American lawyer and university president
- Raymond L. Brett (1917–1996), Professor of English and a friend of Philip Larkin
- Reginald Brett, 2nd Viscount Esher (1852–1930), British politician
- Richard Brett (1567–1637), English scholar
- Robert Brett (1851–1929), Canadian politician
- Simon Brett (born 1945), British writer
- Stephen Brett (born 1985), New Zealand rugby player
- Sylvia Brett (1885–1971), Ranee of Sarawak
- Thomas Brett (1747–1809), English cricketer
- William Baliol Brett, 1st Viscount Esher (1817–1899), British lawyer
- William Brett, Baron Brett (born 1942), English politician and businessman
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