| Seyidan | |
| Settlement Type: | Municipality |
| Pushpin Map: | Azerbaijan |
| Pushpin Mapsize: | 300 |
| Subdivision Type: | Country |
| Subdivision Name: |  Azerbaijan |
| Subdivision Type1: | Rayon |
| Subdivision Name1: | Salyan |
| Population Total: | 878 |
| Timezone: | AZT |
| Utc Offset: | +4 |
| Timezone Dst: | AZT |
| Utc Offset Dst: | +5 |
| Coordinates: | 39.7406°N 48.9564°W |
Seyidan (also, Seydan) is a village and municipality in the Salyan Rayon of Azerbaijan. It has a population of 878.