Mustafapaşa, formerly known as Sinasos, is a town in the Ürgüp District of Nevşehir Province, Turkey. Its population is 1,295. Its status as a town had been downgraded to village with 2013 Reorganisation up until the court order in 2024. It lies to the west of Gomeda valley and is 5 kilometres away from Ürgüp and 27 kilometres away from Nevşehir town.