Peter Fraser (1884–1950) was prime minister of New Zealand from 1940 to 1949.

Peter Fraser may also refer to:

• Peter Fraser (merchant) (1765–1840), merchant and politician in New Brunswick
• Peter Gordon Fraser (1808–1888), Scottish public servant, later politician and artist in Van Diemen's Land
• Peter Fraser (1888–1950), cartoonist, book illustrator, and regular contributor to Punch magazine
• Peter Fraser (classicist) (1918–2007), classical scholar
• Peter Fraser (Northwest Territories politician) (1921–2000), Canadian politician
• Peter Fraser (actor), Scottish actor, known for Doctor Who (1963)
• Peter Fraser, Baron Fraser of Carmyllie (1945–2013), Scottish politician and advocate
• Flip Fraser (Peter Randolph Fraser, 1951–2014), editor of The Voice and writer of the musical Black Heroes in the Hall of Fame
• Peter Fraser (photographer) (born 1953), British photographer
• Peter Fraser (judge) (born 1963), British barrister and judge
• Peter Fraser, fictional character on the Australian soap opera Home and Away