Ian Grant may refer to:
- Ian Grant (physicist) (born 1930), British physicist
- Ian Grant (businessman) (1943–2022), chairman and First Commissioner of the Crown Estate
- Ian F. Grant (born 1940), New Zealand historian, writer, editor and publisher
- Ian Lyall Grant (1915–2020), British army officer, engineer and government official
See also
edit- Iain Hamilton Grant, British philosopher