Muzaffarnagar Assembly constituency is one of the 403 constituencies of the Uttar Pradesh Legislative Assembly, India. It is a part of the Muzaffarnagar district and one of the five assembly constituencies in the Muzaffarnagar Lok Sabha constituency. First election in this assembly constituency was held in 1951 after the "Delimitation Order" (DPACO-1951) was passed in 1951. In 2008, after the "Delimitation of Parliamentary and Assembly Constituencies Order, 2008" was passed, this constituency was assigned identification number 14.

Extent of Muzaffarnagar Assembly constituency is PCs Bilaspur, Jatmunjhera, Makhiyali, Shernagar, Dhandhera, Bhandoora of Kukra KC & Muzaffarnagar NPP of Muzaffarnagar Tehsil.