Jae-jin is a Korean masculine given name. The meaning differs based on the hanja used to write each syllable of the name. There are 20 hanja with the reading " jae" and 48 hanja with the reading " jin" on the South Korean government's official list of hanja which may be registered for use in given names.
People with this name include:
- Cho Jae-jin (born 1981), South Korean football player
- Lee Jae-jin (badminton) (born 1983), South Korean badminton player
- Lee Jae-jin (musician, born 1979), South Korean musician, former member of Sechs Kies
- Lee Jae-jin (musician, born 1991), South Korean musician, member of F.T. Island