Sunsari 4 is one of four parliamentary constituencies of Sunsari District in Nepal.

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

[1] Sunsari 4 incorporates Koshi Rural Municipality, Bhokraha Rural Municipality, wards 6–11 of Barah Municipality, ward 4 of Ramdhuni Municipality, wards 3, 4 and 8 of Inaruwa Municipality and wards 1, 2 and 4–7 of Harinagara Rural Municipality.

It encompasses the following Province No.

1 Provincial Assembly segment