Güldibi is a neighborhood in Hendek District, in Sakarya Province, Türkiye. Güldibi lies at 368 m above sea level, in the Akçakoca Dağları mountains. It has 307 inhabitants. The nearest city is Hendek, 8.2 km to the southwest. Among the landmarks around are Sangarius Bridge (40 km) and Prusias ad Hypium (28 km).