Jonathan Seda is an American actor of Puerto Rican descent, best known for his role as Detective Antonio Dawson in the NBC series Chicago P.D. and Detective Paul Falsone in the NBC series Homicide: Life on the Street. The character Antonio Dawson in Chicago P.D. is the brother of the character Gabriela Dawson in Chicago Fire. Seda was an amateur boxer who in 1992 auditioned and got a role in the film Gladiator.

He became interested in acting and appeared in various films. He played Chris Perez alongside Jennifer Lopez in the film Selena and became widely known to both Spanish-speaking and non-Spanish-speaking communities. He has appeared on television many times, including the role of legendary Marine John Basilone in Tom Hanks' and Steven Spielberg's follow-up to Band of Brothers, The Pacific.