| Clubname: | UD Serra |
| Fullname: | União Desportiva da Serra |
| Ground: | Campo da Portela Santa Catarina da Serra |
| Capacity: | 2,000 |
| Season: | 2021–22 |
| Position: | Portuguese District Championships, promoted |
| Leftarm1: | FF9900 |
| Body1: | FF9900 |
| Rightarm1: | FF9900 |
| Shorts1: | FFFFFF |
| Leftarm2: | FFFFFF |
| Body2: | FFFFFF |
| Rightarm2: | FFFFFF |
| Shorts2: | FFFFFF |
União Desportiva da Serra is a Portuguese football club that competes in the fourth-tier Campeonato de Portugal. They were founded in 1976.
The club was founded in 1976. On 18 August 2010, they played a friendly match against India and was beaten by 3–1.