List of British middleweight boxing champions is a table showing the boxers who have won the British middleweight title.
The title was first contested in 1891, came under the auspices of the National Sporting Club in 1909, and under the juristiction of the British Boxing Board of Control (BBBoC) since it was formed in 1929.
A champion may retire or voluntarily relinquish the title in order to fight for a higher-ranked championship.
Where the date on which a champion relinquished the title is unclear, the date of the last BBBoC sanctioned fight is shown.
r–Champion relinquished title.