Jace or Jase is a masculine given name, often a shortened version of Jason.
People so named include:
Jason Jace Alexander (born 1964), American television director and actor
Jace Amaro (born 1992), American football player
Jace Bode (born 1987), Australian rules footballer
James Jase Bolger, American politician, Speaker of the Michigan House of Representatives since January 2011
Jace Bugg (1976-2003), American professional golfer
DJ /rupture, pseudonym of American DJ and producer Jace Clayton
Jason Jase Daniels (born 1982), former United States Navy Hebrew linguist who was discharged from the military twice under the law known as Don't Ask, Don't Tell
Jace Everett (born 1972), American country music singer
Jason Jace Hall (born 1971), American film, television and video game producer
Jace Lasek, Canadian musician and producer
Jace Norman, American actor
Jace Richdale, American television producer and writer for The Simpsons and other shows
Jason Jase Robertson, on the A&E reality television show Duck Dynasty and Chief Operating Officer of Duck Commander
James Jace Sayler (born 1979), American former football player
Jace Van Dijk (born 1981), Australian rugby league player
Fictional characters include:
Jace Beleren, in the game Magic: The Gathering
Major Jace "Flash" Dillon, in the video game Wing Commander III: Heart of the Tiger
Jason Jase Dyer, from the BBC television soap opera EastEnders
Jonathan Christopher "Jace" Lightwood, in The Mortal Instruments fantasy novel series
Jace, one of Space Ghost's teen sidekicks
Jason "Jace" Newfield, in the movie Going to the Mat