Kumkuyu is a village in Şefaatli District, in Yozgat Province, Türkiye. Kumkuyu lies at 1,020 m above sea level. It has 133 inhabitants. The nearest city is Yozgat, 47 km to the north. Among the landmarks around are Alişar Hüyük (33 km), Gelingüllü Dam (22 km) and Basilica Therma (36 km).