Grogan is a surname. Notable people with the surname include:
- Benjamin Grogan, FBI agent killed in the 1986 FBI Miami shootout
- Clare Grogan (born 1962), Scottish actress and singer
- Cornelius Grogan
- David Grogan (1914-1993), British water polo player
- Emmett Grogan (1943-1978), founder of the hippie group the Diggers
- Ewart Grogan (1874-1967), British explorer of Africa, prominent Kenyan businessman
- George Grogan (1875-1962), recipient of the Victoria Cross
- James Grogan (1931-2000), American figure skater
- John Grogan (UK politician), British politician
- John Grogan (Canadian politician)
- John Grogan (journalist) (born 1957), American journalist
- Kevin Grogan (born 1981), Irish football player
- Liz Grogan, Canadian television host
- Nathaniel Grogan (1740-1807), Irish illustrator
- Steve Grogan (born 1953), American football player