Saptari 4 is one of four parliamentary constituencies of Saptari District in Nepal. This constituency came into existence on the Constituency Delimitation Commission (CDC) report submitted on 31 August 2017. In 2026, Sitaram Sah of Rastriya Swatantra Party won the election from this constituency.
Saptari 4 incorporates Surunga Municipality, Khadak Municipality, Bode Barsain Municipality and Balan Bihul Rural Municipality.
It encompasses the following Provincial Assembly of Madhesh Province segment