Hamm is a surname. Notable people with the name include:

• Adam Hamm (born 1971), American politician
• Bob Hamm (1934–2009), American poet
• Bob Hamm (American football) (born 1959), American football player
• Doyle Hamm (1957–2021), American man convicted of murder
• Harold Hamm (born 1945), American businessman
• Hildegard Hamm-Brücher (1921–2016), a German politician
• John Hamm (born 1938), Canadian politician
• Jon Hamm (born 1971), American actor
• Josip Hamm (1905–1986), Croatian Slavist
• Malik Hamm (born 2000), American football player
• Mia Hamm (born 1972), American soccer player
• Morgan Hamm (born 1982), American gymnast
• Paul Hamm (born 1982), American gymnast
• Peter Hamm (1937–2019), German poet, author, journalist, editor, and literary critic
• Philip Hamm (1859–?), Former member of the Wisconsin State Assembly
• Regie Hamm (born 1967), American songwriter, musician, writer
• Sam Hamm (born 1955), American screenwriter
• Shannon Hamm (born 1967), American guitar player
• Stuart Hamm (born 1960), American bass player

• Ham (surname), mainly Korean surname