William Dufris was an American voice actor and audiobook narrator.

Dufris is best known for voicing the title character in the children’s animated television series Bob The Builder for nine seasons beginning in 1998.

He also voiced that same character (among others) in the series for television movies and live shows including Bob The Builder: The Live Show, Bob The Builder: Building Friendships, Bob The Builder: The Knights of Fix-A-Lot, and Bob The Builder: A Christmas to Remember.

Dufris also lent his voice to video games such as Colony Wars: Red Sun (2000), Backyard Baseball 2001 (2000), Imperium Galactica II: Alliances (2000), The Feeble Files (1998), Colony Wars (1997), and G Police (1997).

Dufris died March 24, 2020 in South Portland, Maine. He was 62.