Munn as a surname may refer to:
- Allison Munn (born 1974), American actress
- Clarence Munn (1908–1975), college football player and coach
- Gurnee Munn (died 1960), American businessman
- Louise Munn (born 1983), Scottish field hockey player
- Meg Munn (born 1959), British politician
- Olivia Munn (born 1980), American actress and TV personality
- H. Warner Munn (1903–1981), American writer
- Geoffrey Munn (born 1953), jewellery expert on the BBC's Antiques Roadshow
Munn may also refer to a poppy seed filling.
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