Adonis Antonio Rivas Ordóñez (born 7 December 1972) is a Nicaraguan former professional boxer who competed between 1995 and 2014.
Rivas turned professional in 1995 and captured the WBO super flyweight title with a decision win over Diego Morales in 1999.
He dropped down in weight in 2002 to fight for the WBO flyweight title against Jair Jimenez and won a majority decision.
He lost the belt later that year to Omar Andres Narvaez.
In 2005 and 2006 he lost a pair of bouts against Jorge Arce for the WBC flyweight title.