The following is a list of WBU world champions, a table showing the world champions certificated by the World Boxing Union (WBU), founded in the United States in 1995. This does not includes champions of the identically named German based organization that was active in the 2010s.
<sup>r</sup> – Champion relinquished title.<br/> <sup>s</sup> – Champion stripped of title.
WBU heavyweight champions have included: