| Honorific-Prefix: | The Honorable |
| Marissa Mercado-Andaya | |
| Office: | Member of the Philippine House of Representatives from Camarines Sur's 1st District |
| Term Start: | June 30, 2019 |
| Term End: | July 5, 2020 |
| Predecessor: | Rolando Andaya Jr. |
| Successor: | Vacant |
| Birth Name: | Marissa Lourdes Lirio Mercado |
| Birth Date: | 7 March 1969 |
| Birth Place: | Manila, Philippines |
| Death Place: | Naga, Camarines Sur, Philippines |
| Death Cause: | Cancer |
| Spouse: | Rolando Andaya Jr. |
| Children: | 2 |
| Party: | Nationalist People's Coalition |
| Occupation: | Politician |
Marissa Lourdes Mercado Andaya (born Marissa Lourdes Lirio Mercado; March 7, 1969 – July 5, 2020) was a Filipina politician who served as congresswoman for Camarines Sur's 1st congressional district from 2019 until her death in 2020.[1]
Mercado-Andaya was born on March 7, 1969. She married Rolando Andaya Jr., and together they had two children named Rolando IV ("Ranton") and Katrina.
In the 2019 elections, she ran as congresswoman for Camarines Sur's 1st district and emerged victorious with 61,480 votes against her sole opponent, Long Mejia, who received 29,228 votes. She took over the position from her term-limited husband, who, in turn, ran for governor of Camarines Sur but was unsuccessful.
Mercado-Andaya was diagnosed with cancer, and her symptoms reemerged in 2020. On July 5, 2020, she died at the age of 51 in Naga City, Camarines Sur. The announcement of her death was made by her husband and her children.