Peter or Pete Spencer may refer to:

• Peter Spencer (religious leader) (1782–1843), American Christian leader
• Peter Spencer (journalist) (active 1970s onwards), British television news journalist
• Peter Spencer (Royal Navy officer) (born 1947), British naval officer and Chief of Defence Procurement
• Peter Spencer (footballer) (born 1956), Australian rules footballer
• Peter Spencer (farmer) (born c. 1948), Australian farmer and political activist
• Peter Bernardo Spencer, lynching victim
• Pete Spencer (born 1948), British musician in the British band Smokie

• Peter Spencer, character in the 2020 film The Grudge

• List of people with surname Spencer