McNutt is a surname of either Scottish or Irish origin. It refers to:
- Persons
- Alexander McNutt (1725–1811), British army officer, colonist, and land agent
- Alexander McNutt (1802–1848), American politician from Mississippi; governor and state senator
- Bill McNutt (1925–2006), American fruitcake marketer
- John G. McNutt (contemporary), American professor and author
- Marcia McNutt (contemporary), American geophysicist and oceanographer
- Paul V. McNutt (1891–1955), American politician from Indiana; governor, ambassador, and federal agency administrator
- Tico McNutt (contemporary), American wildlife researcher
- William Slavens McNutt (1885–1938), American screenwriter
- Leah Beth McNutt (born 1987), American fundraiser
- Fictional persons
- Boob McNutt, comic strip by Rube Goldberg 1915–34
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