Jayce is a first name that is often an abbreviation of Jason. Notable people and fictional characters with the name include:
People
- Jayce Brown (born 2005), American football player
- Jayce Fincher, bassist of the rock group Marvelous 3
- Jayce Hawryluk (born 1996), Canadian ice hockey player
- Jayce Landberg, Swedish musician and novelist
- Jayce Lewis (born 1984), Welsh musician
- Jayne MacDonald (died 1977), English female murder victim
- Jayce Olivero (born 1998), Gibraltarian footballer
- Jayce Tingler (born 1980), American baseball manager
Fictional characters
- the title character of Jayce and the Wheeled Warriors, a 1980s cartoon series
- Jayce Talis, the Defender of Tomorrow, a playable champion character in the multiplayer online battle arena video game League of Legends