Youngest UFC champions

What counts. Age on the NIGHT THE BELT WAS WON, not the week after — the fight date off the official record minus the date of birth on the same source's fighter register (the tale-of-the-tape we load for every fighter page). A champion appears once, at the first undisputed title they ever won, because that is when they became one. The rankings have their own version of this record: age on the first weekly table that carried a fighter on the champion line, which starts in February 2013 and so cannot see a belt won before it. A title fight is identified by the exact weight-class string the official record uses for the undisputed belt — “UFC Middleweight Title Bout” and its eleven siblings. The same column carries ninety-odd Ultimate Fighter and Road to UFC tournament finals with “Title Bout” in the name, and none of them is a world title, so they are matched exactly rather than searched for. Interim titles are not reigns here. An interim belt is not the undisputed title, so a fighter who held one starts that reign at the fight that unified it — the row says where that happened. 1 ranked name is left out entirely — Bruno Silva is shared by two different fighters our source roster cannot tell apart, so any career total under it would be two people's added together. That page is withheld for the same reason. Ties. 2 of the rows below share the same 27 years and 4 months. Age is counted in days, so two champions the same number of years and months old are still in the order their ages actually ran; where the days are equal too, the earlier title win is listed first. Where it comes from. Every reign on this page is cut out of the UFC’s own statistical record of the title fights themselves, 1997 to today — not from the weekly ranking tables, which only begin in February 2013. A reign starts on the night the belt was won, and both dates on every row are fights you can open and check. A title fight is identified by the exact weight-class string the official record uses for the undisputed belt — “UFC Middleweight Title Bout” and its eleven siblings. The same column carries ninety-odd Ultimate Fighter and Road to UFC tournament finals with “Title Bout” in the name, and none of them is a world title, so they are matched exactly rather than searched for. Each name links that fighter’s own page, where every title fight this row is built from has its own row and its own bout page. Who holds every belt right now is on the champions page.