Peter Birch may refer to:

• Peter Birch (actor) (1952–2017), British actor
• Peter Birch (bishop) (1911–1981), Roman Catholic bishop of Ossory, 1964–1981
• Peter Birch (Emmerdale), a fictional character in Emmerdale
• Peter Birch-Reichenwald (1843–1898), Norwegian politician

• The Infinite
• The Infinite Steve Vai: An Anthology
• The Infinite Vulcan
• The Infinity Crusade
• The Infinity Gauntlet
• The infinity project
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• The Influance of Sea Power Upon History
• The Influence of Sea Power Upon History
• The Informer (1935)
• The Informer (1935 film)
• The Informers
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• The Ingoldsby Legends
• The Inheritors (Conrad and Ford novel)
• Theinhko
• The Inhumans
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• The Initial Friend
• The Initiative (Buffy the Vampire Slayer episode)
• The Initiative (Buffy the Vampire Slayer organization)
• The Injustice to Dou E
• The Ink Flag
• Thein-kho