Donnie Liboon Nietes (born May 12, 1982) is a Filipino professional boxer.
He is a world champion in four weight-classes, having previously held the WBO mini-flyweight title from 2007 to 2011; the WBO and The Ring magazine junior-flyweight titles between 2011 and 2016; IBF flyweight title from 2017 to 2018; and the WBO junior-bantamweight title from 2018 to 2019.
He is the longest-reigning Filipino boxing world champion, surpassing in 2014 the record set in 1967 by Boxing Hall of Fame inductee Gabriel "Flash" Elorde.
He was one of the first three Asian fighters with world titles in at least four weight classes alongside fellow Filipinos Manny Pacquiao and Nonito Donaire.
As of October 2019, Nietes is ranked as the world's third best active junior-bantamweight by The Ring and Transnational Boxing Rankings Board, and fourth by BoxRec.