| Official Name: | Zaidín/Saidí |
| Subdivision Name3: | Zaidín/Saidí |
| Area Total Km2: | 93 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
Zaidín (pronounced as /es/) or Saidí (pronounced as /ca/) is a municipality located in the province of Huesca, Aragon, Spain. According to the 2004 census (INE), the municipality has a population of 1,721 inhabitants.