Şeyhler is a neighborhood in Hendek District, in Sakarya Province, Türkiye. Şeyhler lies at 120 m above sea level, 0.8 km from the Akçakoca Dağları mountains. It has 428 inhabitants. The nearest city is Hendek, 6.6 km to the east. Among the landmarks around are Sangarius Bridge (26 km) and Sakarya Museum (23 km).