Domariyaganj (formerly Domariaganj) is one of the 80 Lok Sabha (parliamentary) constituencies in the Indian state of Uttar Pradesh. This constituency covers the entire Siddharthnagar district.

Presently, Domariyaganj Lok Sabha constituency comprises five Vidhan Sabha (legislative assembly) segments. These are:

27°12′N 82°42′E / 27.2°N 82.7°E / 27.2; 82.7