Dere is a neighborhood in Orhaneli District, in Bursa Province, Türkiye. Dere lies at 759 m above sea level, in the Anatolian plateau mountains. It has 61 inhabitants. The nearest city is Bursa, 44 km to the north. Among the landmarks around are Büyükorhan Dam (5.0 km) and Hadriani ad Olympum (12.7 km).