Martelli may refer to:
- People
- Alex Martelli (born 1955), Italian computer scientist
- Carlo Martelli (born 1935), English composer
- Claudio Martelli (born 1943), Italian politician
- Esmond Martelli (1878—1926), Irish rugby union player
- Francesco Martelli (1633—1717), Italian Roman Catholic cardinal
- Otello Martelli (1902—2000), Italian cinematographer
- Phil Martelli (born 1954), American basketball coach
- Ugolino Martelli (1860–1934), Italian biologist
- Other
- 4061 Martelli, a main belt asteroid named for Giuseppe Martelli
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