Mutluca is a village in Niksar District, in Tokat Province, Türkiye. Mutluca lies at 463 m above sea level, in the Köse Dağları mountains. It has 98 inhabitants. The nearest city is Niksar, 23 km to the northwest. Among the landmarks around are Almus Dam (18.0 km) and Ataköy Dam (19.7 km).