Ismo may refer to:
- -ism in Spanish, Portuguese, Esperanto and Italian
- Ismo, a brand name for isosorbide mononitrate
Given name
edit- Ismo Alanko (born 1960), Finnish musician
- Ismo Falck (born 1966), Finnish archer
- Ismo Hölttö (born 1940), Finnish photographer
- Ismo Junni (1943–1995), Finnish serial killer and arsonist
- Ismo Kamesaki (born 1970), Finnish wrestler
- Ismo Kanerva (born 1942), Finnish rower
- Ismo Laitela, a fictional character
- Ismo Lehkonen (born 1962), Finnish ice hockey player
- Ismo Leikola (born 1979), Finnish comedian
- Ismo Lius (born 1965), Finnish footballer
- Ismo Sajakorpi (born 1944), Finnish director and screenwriter
- Ismo Toukonen (born 1954), Finnish steeplechase runner
- Ismo Villa (1954–2014), Finnish ice hockey player
- Ismo Vorstermans (born 1989), Dutch footballer