John Francis "Jon" Cassar (born 27 April 1958) is a Maltese-Canadian television director and producer, known for his work on the first seven seasons of 24.

In 2006, he won the Primetime Emmy Award for Outstanding Directing for a Drama Series for his work on the episode "Day 5: 7:00 a.m. – 8:00 a.m.".

[2] After La Femme Nikita ended, for which he directed 14 episodes, Cassar began working as director and executive producer on the FOX drama-thriller series 24.

[3] In addition, he was nominated for the Primetime Emmy Award for Outstanding Drama Series four years in a row (2003–06), winning one in 2006.

[8] In 2015, Cassar joined the ABC anthology series Wicked City as an executive producer and director.