William James Baden Dallison (20 June 1900 – 25 March 1946) was a motorcycle speedway rider who rode in the earliest days of the sport in Britain.

[1][2] Dallison, born in Camberwell, rode in the pioneer years of British speedway beginning his British leagues career riding for White City, Manchester during the 1929 Speedway English Dirt Track League season.

[3] He helped the team set the pace and lead the league table, winning 18 of their 20 matches but following a dispute, Manchester withdrew from the league handing Leeds the title.

[4] He rode for Hall Green Bulldogs during the 1930 Speedway Southern League and would remain one of the sports leading riders until the outbreak of World War II.

[8] Dallison is listed as number 11 of 50 in the 1930s Player's cigarette card collection.