Ognjen (Serbian Cyrillic: Огњен, pronounced [ǒɡɲen]) is a Serbian given name derived from the word oganj meaning "fire" and may refer to:
- Ognjen Amidžić, Serbian TV host
- Ognjen Aškrabić (born 1979), Serbian professional basketball player
- Ognjen Cvitan (born 1961), Croatian (formerly Yugoslavian) chess grandmaster
- Ognjen Filipović (born 1973), Yugoslav-born sprint canoeist
- Ognjen Koroman (born 1978), Serbian footballer
- Ognjen Kuzmić, Serbian professional basketball player
- Ognjen Lekić (born 1982), Serbian professional football player
- Ognjen Mudrinski (born 1991), Serbian footballer
- Ognjen Petrović (1948–2000), Serbian goalkeeper
- Ognjen Prica (1899–1941), Yugoslav left-wing politician
- Ognjen Stojanović (born 1990), Serbian triathlete
- Alberto Ognjen Štriga (1821–1897), Croatian reformer, composer and musician
- Ognjen Sviličić (born 1971), Croatian screenwriter and film director
- Ognjen Tadić (born 1974), Serb politician
- Ognjen Topic (born 1986), American Muay Thai champion
- Ognjen Vranješ (born 1989), Bosnian Serb professional footballer
- Ognjen Vukojević (born 1983), Croatian footballer who plays as a defensive midfielder
- Ognjen Jaramaz (born 1993), Serbian professional basketball player
- Ognjen Đerić (born 1994),French professional handball player
- Ognjen Milić (born 2005),Professional basketball player