Grand Street and Grand Avenue are the respective names of a street which runs through the boroughs of Brooklyn and Queens, New York City, United States. Originating in Williamsburg, Brooklyn, Grand Street runs roughly northeast until crossing Newtown Creek into Queens, whereupon Grand Street becomes Grand Avenue, continuing through Maspeth where it is a main shopping street, until reaching its northern end at Queens Boulevard in Elmhurst.

Williamsburg is a neighborhood in the New York City borough of Brooklyn, bordered by Greenpoint to the north; Bedford–Stuyvesant to the south; Bushwick and East Williamsburg to the east; and the East River to the west. It was an independent city until 1855, when it was annexed by Brooklyn; around that time, the spelling was changed from Williamsburgh to Williamsburg.