| María Mercedes Maciel Ortiz | |
| Birth Date: | 1959 12, df=yes |
| Birth Place: | Ciudad Manuel Doblado, Guanajuato, Mexico |
| Occupation: | Politician |
| Party: | PT |
María Mercedes Maciel Ortiz (born 1 December 1959) is a Mexican politician from the Labor Party. She has served as Deputy of the LVII and LX Legislatures of the Mexican Congress representing Oaxaca.[1] She previously served as a regidora (city councillor) in Tijuana from 1986 to 1989, elected as a member of the now-defunct Workers' Socialist Party (PST).[1]