Dumlusu is a neighborhood in Of District, in Trabzon Province, Türkiye. Dumlusu lies at 98 m above sea level, in the Rize Dağları mountains. It has 681 inhabitants. The nearest city is Of, 5.9 km to the north. Beaches nearby: Of Soğukpınar Mah. Barınak Önü (5.3 km), Çamburnu Beach (6.2 km), Kıyıcık (8.1 km). Among the landmarks around are Hapsiyaş bridge (8.3 km), Eskipazar Castle (9.3 km) and Of Castle (5.1 km).