Westchester County is an area in the Hudson Valley north of New York City. The Hudson Highlands State Park Preserve includes the steep Breakneck Ridge Trail. Kykuit, the Rockefeller family’s opulent hilltop estate, has terraced gardens and 20th-century statues. Across the Hudson River, Bear Mountain State Park features hiking trails, the Trailside Museums & Zoo and panoramic views from the top of Bear Mountain.

Area: 500 mi²
Population: 997,895 (2021)
Area code: 914
County seat: White Plains

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Bronx County

Bronx County was the last of the 62 counties of New York State to be incorporated. Although the Bronx is the third most densely populated county in the U.S., about a quarter of its area is open space, including Woodlawn Cemetery, Van Cortlandt Park, Pelham Bay Park, the New York Botanical Garden and the Bronx Zoo.

Area: 42.47 mi²
Population: 1.427 million (2020)
Area code: 718, 917