Ruth Mariano Hernandez (born May 16, 1974) is a Filipina politician and Member of the Philippine House of Representatives of Laguna's 2nd District since 2019.

[2] She previously served as board member of Laguna from 2016 to 2019 and councilor of Calamba from 1995 to 2004 and from 2007 to 2016.

In 2019, she ran as Member of the Philippine House of Representatives from Laguna's 2nd District and re-elected as congresswoman in 2022.

Mariano-Hernandez married Ramil Hernandez, whom she met as a fellow councilor of Calamba,[3] and have two children.

She finished her undergraduate degree in the University of the Philippines Los Baños.