List of British welterweight boxing champions

List of British welterweight boxing champions is a table showing the boxers who have won the British welterweight championship. The title has been sanctioned by the National Sporting Club since 1909, and later by its replacement British Boxing Board of Control since 1929.

A champion may retire or voluntarily relinquish the title in order to fight for a higher-ranked championship. Where a champion relinquished the title and the date is not known, the date of his final defence is shown with “(rel)” after it. If he did not defend his title, then “(rel)” is shown after the date at which he won the title.