Joi Johannsson
- Title: Joi Johannsson
- Popularity: 3.09
- Known For: Acting
- Birthday: 1971-11-23
- Place of Birth: Reykjavík, Iceland
- Homepage: http://www.joijohannsson.com
- Also Known As: Johann Johannson, Johann Johannsson, Jóhann G. Jóhannsson, Jói Jóhannsson