Tilothu, also spelled Tilauthu or Tilothu, is a village and corresponding community development block in Rohtas district, Bihar, India. It is located 15 km from Dehri-on-Sone on the west bank of the Son River. As of 2011, the population of Tilouthu was 16,402, in 2,745 families, while the corresponding block population was 109,249. The census town of is located within Tilouthu block, immediately south of the village of Tilouthu. stands erect in the west of the city whereas the river Sone blesses the farmers with its water in the east.