[Edit] 
Joe Louis held the Title from June 22, 1937 until he announced his retirement on March 1, 1949.
First answer by Hhascup. Last edit by Hhascup. Contributor trust: 139 [recommend contributor]. Question popularity: 4 [recommend question]
Answers.com > Wiki Answers > Categories > Sports > Boxing > Who is the longest lasting heavyweight boxing champion?
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Longest world boxing champion? Longest lasting Heavyweight Champion? The longest-lasting heavyweight boxing champion? Who is the longest lasting heavy weight boxing champion?
