Mary Liza Diño (born June 25, 1981) is a government official, former beauty pageant winner and actress in the Philippines.

She then joined GMA 7 artist center and appeared in Daddy Di Do Du, Pira-pirasong Pangarap, Habang Kapiling Ka, Atlantika, and Bakekang.

Her first theater role was at Dulaang University of the Philippines (DUP), where she appeared onstage in The Passion of the Christ under Tony Mabesa, and in Divinas Palabras (2000) and Shakespeare's The Winter's Tale (2002), both under director Jose Estrella.

Her latest film project, a Flamenco dance movie directed by Will Fredo entitled In Nomine Matris, was released in 2012.

In 2014, she played a cameo role in the television show The Legal Wife as Nicole's mother in flashbacks, and later became part of the cast of Mirabella as Aster.