Mahottari 1 is one of four parliamentary constituencies of Mahottari District in Nepal.

This constituency came into existence on the Constituency Delimitation Commission (CDC) report submitted on 31 August 2017.

[1]Mahottari 1 incorporates Bardibas Municipality, Gaushala Municipality and wards 3–5 and 9 of Bhangaha Municipality.

It encompasses the following Province No.

2 Provincial Assembly segment