The Bronx is the northernmost of the five boroughs of New York City. It is also, known as Bronx County, the last of the 62 counties of New York State to be incorporated. Located north of Manhattan and Queens, and south of Westchester County, the Bronx is the only borough located primarily on the mainland. In 2010, the Census Bureau estimated that the borough's population on July 1, 2009 was 1,397,287,New York's Five Boroughs at a GlanceJurisdictionPopulationLand AreaBorough ofCounty ofestimate for1 July 2009squaremilessquarekmManhattanNew York1,629,0542359The BronxBronx1,397,28742109BrooklynKings2,567,09871183QueensQueens2,306,712109283Staten IslandRichmond491,73058151City of New York8,391,881303786State of New York19,541,45347,214122,284Source: United States Census BureauThe Bronx is divided by the Bronx River into a hillier section in the west, closer to Manhattan, and the flatter East Bronx, closer to Long Island. The West Bronx was annexed to New York City (then largely confined to Manhattan) in 1874, and the areas east of the Bronx River in 1895. including Woodlawn Cemetery, Van Cortlandt Park, Pelham Bay Park, the New York Botanical Garden and the Bronx Zoo in the borough's north and center, on land deliberately reserved in the late 19th century as urban development progressed northwards and eastwards from Manhattan with the building of roads, bridges and railways.The Bronx River was named for Jonas Bronck, an early settler from Småland in Sweden whose land bordered the river on the east. The borough of the Bronx was named for the river that was "Bronck's River". The indigenous Lenape (Delaware) American Indians were progressively displaced after 1643 by settlers from the Netherlands and Great Britain. The Bronx received many Irish, German, Jewish and Italian immigrants as its once-rural population exploded between the mid-19th and mid-20th centuries. They were succeeded after 1945 by African Americans and Hispanic Americans from the Caribbean basin — especially Puerto Rico and the Dominican Republic, but also from Jamaica. In recent years, this cultural mix has made the Bronx a wellspring of both Latin music and hip hop.The Bronx contains one of the five poorest Congressional Districts in the U.S., (the 16th), but its wide variety of neighborhoods also includes the affluent Riverdale and Country Club.