Gein may refer to:

People

• Ed Gein (1906–1984), American murderer

• Gidget Gein (1969–2008), American musician and artist

Other uses

• Ed Gein (band), a Syracuse grindcore band named after the serial killer

• Gein metro station, also neighbourhood, in Amsterdam-Zuidoost

• Gein, comic book character from Rurouni Kenshin, see list of characters

• Special Intelligence Group (GEIN), a defunct intelligence agency in Peru