Jaime Jefferson Guilarte (Spanish pronunciation: [ˈxajme ˈʝefeɾsoŋ ɡiˈlaɾte]; born 17 January 1962) is a retired Cuban long jumper.

A predecessor of the greatest Cuban long jumper, Ivan Pedroso, he was also capable of big jumps, taking more international medals in a career that spanned for over a decade.

At the Pan-American Games in Indianapolis in 1987, he improved his PB to 8.51m to collect bronze medal behind Carl Lewis and Larry Myricks (both USA), but couldn't reproduce that at the World Championships in Rome finishing 6th with 8.14m.

Next season finally brought Jefferson's first Olympic appearance and he finished creditable 5th in Barcelona, again behind great Carl Lewis.

Jaime Jefferson won his final international medal at 1997 CAC Championships in San Juan where he finished behind his famous compatriot Ivan Pedroso, by then World's finest long jumper, and retired at the end of the season.