William Venturini (born February 14, 1953), nicknamed "Big Bill", is a retired American professional stock car racing driver. He is the founder and co-owner of Venturini Motorsports, a team that competes in the ARCA Menards Series. As a driver, he primarily competed in the same series from 1982 through 1996. Venturini has won two ARCA championships, which came in 1987 and 1991.