Vasai Assembly constituency is one of the 288 Vidhan Sabha (Legislative Assembly) constituencies of Maharashtra state in western India. It is one of the six Vidhan Sabha constituencies located in Palghar district.
Vasai is part of Palghar Lok Sabha constituency along with five other Vidhan Sabha constituencies in Palghar district, namely Dahanu, Vikramgad, Palghar, Boisar and Nalasopara.
Before the delimitation, Vasai Assembly constituency was part of the Mumbai North Lok Sabha constituency.