<P> Overall , there have been 91 different champions . Ric Flair holds the record for having the most reigns at six , while John Cena holds the record for most reigns under the WWE banner at five . Lex Luger holds the record for the longest reign , with his third reign lasting a total of 523 days , while Dean Ambrose holds the longest reign under the WWE banner , at 351 days ( overall the third longest in the title 's history ) . Only two men , Lex Luger and Rick Rude , have held the championship for a continuous reign of one year ( 365 days ) or more . </P>
who has won the most united states championships
Ric Flair