Turnipseed is a surname. Notable people with the surname include:
Erica Simone Turnipseed (born 1971), American author Tom Turnipseed (1936–2020), American politician and activist
Fictional people Harold and Martha Turnipseed, characters in the video game Destroy All Humans! Adrian Turnipseed, a character in the Unseen University in books by Terry Pratchett
See also Donald Turnupseed, driver involved in the death of James Dean