Who is Kyle Broflovski's father?

Kyle Broflovski's father is Gerald Broflovski.

Gerald is one half of Kyle's Jewish family in South Park, alongside Kyle's mother, Sheila Broflovski. The Broflovski household also includes Ike, Kyle's younger adopted brother, who was born in Canada. Gerald is generally depicted as a caring parent who tries to teach Kyle moral lessons, even when his own behavior becomes hypocritical or absurd.

Kyle's relationship with Gerald is usually warmer and less confrontational than his relationship with Sheila. Gerald works as a lawyer and has served as South Park's city attorney, while Sheila is known for her forceful activism and intense protectiveness. The family moved between South Park and San Francisco during the series, but Gerald remains Kyle's father throughout the show's continuity.

Viewers sometimes confuse Kyle's father with other South Park dads, especially Randy Marsh or Stuart McCormick, because those characters are also prominent parents in the town. The canonical answer is Gerald Broflovski, not one of Kyle's friends' fathers.