Seydiler is a district town in Kastamonu Province, Turkey.

Seydiler may also refer to the following places in Turkey: Seydiler District, Kastamonu Province Seydiler, İscehisar, a town in Afyonkarahisar Province Seydiler, Manavgat, a village in Antalya Province Seydiler, Tefenni, a village in Burdur Province