Peter Fisher may refer to:
- Peter Fisher (photojournalist) (1929–2013), Hungarian-born cinematographer and photojournalist
- Peter Fisher (actor) (born 1954), Australian film and television actor
- Peter Fisher (politician) (born 1936), member of the Australian House of Representatives
- Peter Fisher (1930s footballer), Scottish professional association footballer
- Peter Fisher (footballer, born 1920) (1920–2010), Scottish footballer
- Peter Fisher (activist) (1944–2012), American author and gay rights activist
- Peter Fisher (historian) (1782–1848), Canadian historian
- Peter Fisher (musician) ([fl. 1990–now), of the British band Sphere3 and Irish band Glyde
- Peter Fisher (physician) (1950–2018), British physician
- Peter Fisher (puritan) (fl 1630-1657) active in puritan cuse in Ipswich
- Peter Fisher (translator) (born 1934), British academic, known for translating Gesta Danorum
- Peter R. Fisher (born 1956), U.S. Under Secretary of the Treasury
- Peter H. Fisher, physicist