Domariaganj is a town and tehsil of Siddharthnagar district in eastern Uttar Pradesh.

It is located on the bank of the river Rapti, 30 km south of the Nepal border.

Domariaganj is also the name of one of the 80 Lok Sabha (parliamentary) constituencies in Uttar Pradesh.

Siddharthnagar is one of the 75 districts of Uttar Pradesh, which is located in northern India.

[2] Maharaja Kesri Singh was the last ruler of Kalhans dynasty based at Chaukhara.