Mumcuoğlu is a village in Devrek District, in Zonguldak Province, Türkiye. Mumcuoğlu lies at 525 m above sea level, in the Akçakoca Dağları mountains. It has 227 inhabitants. The nearest city is Devrek, 7.4 km to the east. Among the landmarks around are Heraclea Pontica (39 km), Kozlu Dam (21 km) and Kızılcapınar Dam (22 km). Among the natural features are Gökgöl Cave (23 km).