Onbaşılar is a village in Alaca District, in Çorum Province, Türkiye. Onbaşılar lies at 963 m above sea level, 8.6 km from the Anatolian plateau mountains. It has 80 inhabitants. The nearest city is Yozgat, 35 km to the south. Among the landmarks around are Hattusa (23 km), Yazılıkaya (22 km) and Alaca Höyük (16.7 km).