Longest reigning heavyweight champions

Below is a list of longest reigning heavyweight champions in boxing measured by the individual's longest reign. Career total time as champion (for multiple time champions) does not apply. It includes their most consecutive successful title defenses, career grand total title defenses (for multiple time champions) does not apply.

The following title reigns are not recognized as official reigns due to: long periods of inactivity, legitimacy of title, false billing & promotion etc.

As of February 27, 2016. This list includes only major titles, and it doesn′t include lineal championships.

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Wikipedia