Breyer may refer to:

• Charles Breyer (disambiguation), several people
• Gyula Breyer (1893–1921), Hungarian chess player
• Jacques Breyer (1922–1996), French writer and esotericist
• Jim Breyer (born 1961), American venture capitalist
• Johann Breyer (1925–2014), Nazi German genocide criminal
• Carl Magnus von Breyer (1746–1813), Baltic German naval officer in the Imperial Russian Navy
• Karl Wilhelm Friedrich von Breyer (1771–1818), German historian
• Mirko Breyer (1863–1946), Croatian writer, bibliographer, and antiquarian
• Stephen Breyer (born 1938), Associate Justice of the U.S. Supreme Court
• Tadeusz Breyer (1874–1952), Polish sculptor and medallic artist

• Breyer Animal Creations, a company that makes horse figurines
• Breyer State University, an unaccredited, Internet-based entity
• Breyers, a company that makes ice cream

• Breyers
• Bryer