Seydan

Seydan may refer to:
 * Seyidan, a village and municipality in Azerbaijan
 * Seydan, Kurdistan, a village in Iran
 * Seydan, Bijar, Kurdistan Province, a village in Iran
 * Seydan, West Azerbaijan, a village in Iran
 * Seydun, a city in Iran
 * Seyyedan, a city in Iran
 * Seydan, alternate name of Farah Kosh-e Olya, a village in Iran