Walter John Anderson (born September 29, 1952) is a former American football official in the National Football League (NFL) from the 1996 NFL season to the 2019 NFL season. He wore uniform number 66. Anderson spent his first seven seasons in the NFL as a line judge before being promoted to referee for the start of the 2003 NFL season after Dick Hantak and Bob McElwee announced their retirements. He is notable for officiating Super Bowl XXXV. Anderson was also named as referee for Super Bowl XLV which was played on February 6, 2011, in Arlington, Texas, at Cowboys Stadium.