Maria Liliana Olivero (born 20 January 1956) is a former member of the provincial legislature in Córdoba Province, Argentina.
She is a member of the Socialist Left (Argentina).
She was elected in 2003, and re-elected in 2007 and 2011, the last time as a candidate of the Workers' Left Front.
She was the Front's no. 1 candidate for Córdoba Province in the Argentine legislative election, 2013. She only missed election narrowly, and there was a dispute over the result.
In December 2013 she stood down as a provincial deputy, under the agreement to rotate the Front's seats, and handed over to Cintia Frencia.
She is a child psychologist, and has two children.