[1] He has been elected thrice to the legislative assembly and he represents Bahadurpur (Vidhan Sabha constituency).

[2][3] Madan Sahni's political career has seen a meteoric rise, starting from Panchayat to Bihar legislative Assembly.

Soon, due to his social works and ground understanding of politics, he was given JD(U) symbol to contest from Bahadurpur constituency.

In the next election (2015), he was shifted to Gaura Bauram constituency which he won too by a bigger margin, thus being inducted as Cabinet Minister.

In the 2020 election, he made a comeback to his home constituency of Bahadurpur and won.