List of world welterweight boxing champions
The welterweight world champions listed from Mysterious Billy Smith to Harry Lewis are claimants who were not widely accepted outside of the USA as world champions, and are thus not traditionally included in the list of world champions in the welterweight division. Starting with Paddy Duffy follows a more widely accepted chronological List of World Welterweight Boxing Champions, as recognized by four of the major sanctioning bodies:
- The World Boxing Association, founded in 1921 as the National Boxing Association
- The World Boxing Council, founded in 1963
- The International Boxing Federation, founded in 1983
- The World Boxing Organization, founded in 1988
Lists of Champions