| Rosa María Serrano Sierra | |
| Honorific-Suffix: | MEP |
| Office: | Member of the European Parliament for Spain |
| Termstart: | 16 July 2024 |
| Office1: | Member of the Senate of Spain |
| Term Start1: | 17 August 2023 |
| Term End1: | 30 June 2024 |
| Successor1: | Miguel Gracia Ferrer |
| Constituency1: | Huesca |
| Term Start2: | 3 December 2019 |
| Term End2: | 28 July 2021 |
| Successor2: | Rubén Villacampa |
| Constituency2: | Huesca |
| Office3: | Delegate of the Government of Spain in Aragon |
| Term Start3: | 27 July 2021 |
| Term End3: | 13 June 2023 |
| Primeminister3: | Pedro Sánchez |
| Predecessor3: | Pilar Alegría |
| Successor3: | Fernando Beltrán |
| Birth Date: | df=y 11 November 1969 |
| Party: | Spanish Socialist Workers' Party |
| Otherparty: | Party of European Socialists |
Rosa María Serrano Sierra (born 11 November 1969) is a Spanish politician of the Spanish Socialist Workers' Party who was elected member of the European Parliament in 2024.[1] She previously served in the Senate of Spain and as government delegate in Aragon.[2]