Xavier Antonio Abreu Sierra (born February 11, 1950, in Mérida, Yucatán) is a Mexican politician affiliated with the National Action Party (PAN).
Abreu served in the cabinet of Governor Patricio Patrón Laviada as Secretary of Social Development.
[citation needed] In December 2006, Abreu contested for the PAN nomination for Governor of Yucatán; he won the PAN primaries defeating Ana Rosa Payán and Luis Correa Mena.
In February 2007, the New Alliance party showed support for Abreu by nominating him as their "common candidate" to the state government.
Abreu lost the election to the Institutional Revolutionary Party candidate Ivonne Ortega.