| Clubname: | Santa Mariña |
| Fullname: | Unión Deportiva Santa Mariña de Cabral |
| Founded: | 1947 |
| Ground: | Cotogrande |
| Chairman: | Manuel Pena Pornomeñe |
| League: | Various |
| Leftarm1: | CC0000 |
| Body1: | CC0000 |
| Rightarm1: | CC0000 |
| Shorts1: | 3333AA |
| Socks1: | CC0000 |
| Leftarm2: | 3333AA |
| Body2: | 3333AA |
| Rightarm2: | 3333AA |
| Shorts2: | 3333AA |
| Socks2: | CC0000 |
Unión Deportiva Santa Mariña is a Spanish football club based in Cabral, a parish of Vigo in the autonomous community of Galicia.
Home matches are held at Instalaciones Deportivas de Cotogrande, and team colours are red shirt, blue shorts and red socks.
Santa Mariña was founded in 1942 as C.D. Cabral, changing its name five years later to Unión Deportiva Santa Mariña de Cabral. Over the years the club focused in youth development, and as such did not have a proper senior team, but various youth sides competing in separate divisions according to their age groups. It currently has an amateur senior side that competes in the regional lower leagues.