Ismo is a given name. Notable people and characters with the name include:

• Ismo Alanko, Finnish musician
• Ismo Falck, Finnish archer
• Ismo Hölttö, Finnish photographer
• Ismo Junni (1943–1995), Finnish serial killer and arsonist
• Ismo Kamesaki, Finnish wrestler
• Ismo Kanerva, Finnish rower
• Ismo Laitela, fictional character in the Finnish soap opera Salatut elämät
• Ismo Lehkonen, Finnish ice hockey player
• Ismo Leikola, Finnish comedian
• Ismo Lius, Finnish footballer
• Ismo Sajakorpi, Finnish director and screenwriter
• Ismo Toukonen, Finnish steeplechase runner
• Ismo Villa (1954–2014), Finnish ice hockey player
• Ismo Vorstermans, Dutch footballer