Hallaçlı is a village in Şefaatli District, in Yozgat Province, Türkiye. Hallaçlı lies at 974 m above sea level, 13.5 km from the Anatolian plateau mountains. It has 138 inhabitants. The nearest city is Yozgat, 32 km to the north. Among the landmarks around are Hattusa (58 km), Pteria (28 km) and Alişar Hüyük (34 km).