Manhattan Island The Island is about from north to south, and at its widest, . Manhattan Island is loosely divided into Downtown (Lower Manhattan), Midtown (Midtown Manhattan), and Uptown (Upper Manhattan), with Fifth Avenue dividing Manhattan lengthwise into its East Side and West Side. Manhattan Island is bounded by the Hudson River to the west and the East River to the east. To the north, the Harlem River divides Manhattan Island from the Bronx and the mainland United States. Early in the 19th century, land reclamation was used to expand Lower Manhattan from the natural Hudson shoreline at Greenwich Street to West Street. When building the World Trade Center in 1968, of material excavated from the site was used to expand the Manhattan shoreline across West Street, creating Battery Park City. Constructed on piers at a cost of $260 million, Little Island opened on the Hudson River in May 2021, connected to the western termini of 13th and 14th Streets by footbridges.
manhattan island the island is about from north to south and at its widest  manhattan island is loosely divided into downtown (lower manhattan) midtown (midtown manhattan) and uptown (upper manhattan) with fifth avenue dividing manhattan lengthwise into its east side and west side manhattan island is bounded by the hudson river to the west and the east river to the east to the north the harlem river divides manhattan island from the bronx and the mainland united states early in the 19th century land reclamation was used to expand lower manhattan from the natural hudson shoreline at greenwich street to west street when building the world trade center in 1968 of material excavated from the site was used to expand the manhattan shoreline across west street creating battery park city constructed on piers at a cost of $260 million little island opened on the hudson river in may 2021 connected to the western termini of 13th and 14th streets by footbridges