| Honorific-Prefix: | The Honourable |
| Maria Valentina Galido Plaza | |
| Office1: | Member of the Philippine House of Representatives from Agusan del Sur's 1st congressional district |
| Term Start1: | June 30, 2010 |
| Term End1: | June 30, 2019 |
| Predecessor1: | District established |
| Successor1: | Alfelito Bascug |
| Office2: | Governor of Agusan del Sur |
| Term Start2: | June 30, 2007 |
| Term End2: | June 30, 2010 |
| Predecessor2: | Adolph Edward G. Plaza |
| Preceding2: | Adolph Edward G. Plaza |
| Birth Date: | 1 June 1967 |
| Birth Place: | Pasay |
| Nationality: | Filipino |
| Party: | NUP (2011-present) |
| Residence: | Prosperidad, Agusan del Sur |
| Education: | University of the Philippines Los Baños (BS) |
Maria Valentina Galido Plaza is the former governor and current representative of the first district of the Philippine province of Agusan del Sur. She was Agusan del Sur's second female governor.
Plaza is the daughter of former governors Democrito Plaza and Valentina Plaza. She is also the sister of incumbent governor Adolph Edward "Eddiebong" Plaza and former congressman Rodolfo "Ompong" Plaza. She graduated from the University of the Philippines Los Baños with a degree in agricultural business.
Although a neophyte, in 2007, Plaza chose to run for governor of Agusan del Sur with the help of her brother Eddiebong Plaza. She won as the second female governor after her mother.[1]
In the 2010 elections, Plaza was elected as the first representative of the newly created 1st district of the province of Agusan del Sur.[2]