Unser was the father of two sons, Bobby Jr. and Robby, and two daughters, Cindy and Jeri. Unser coached Robby for the 1998 and 1999 Indianapolis 500. Bobby Unser Jr., who participated in racing before giving it up to pursue stunt car driving, music, and horse breeding, died less than two months after his father at the age of 65, as a result of complications from hip surgery.