Halhalca is a neighborhood in İnegöl District, in Bursa Province, Türkiye. Halhalca lies at 556 m above sea level, in the Uludağ mountains. It has 264 inhabitants. The nearest city is İnegöl, 10.8 km to the southeast. Among the landmarks around are Nicaea (39 km), Grand Mosque of Bursa (32 km) and Gölbaşı Dam (11.8 km).