Filoni grew up in Mt. Lebanon, a suburb near Pittsburgh, Pennsylvania. He attended Mt. Lebanon High School, graduated in 1992, then was accepted into the Edinboro University of Pennsylvania. Dave was in the marching band at Mt. Lebanon, and he was the starting goaltender for half of his senior year on the hockey team.
His hobbies include playing ice hockey, still playing the position of goalie. In addition, he is a level eighty Night Elf Hunter in World of Warcraft, a longtime Godzilla fan, an unofficial Dúnedain, and a fan of the Pittsburgh Steelers.