Mercer County

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Mercer County, County capital in central New Jersey, US

Mercer County extends across 229 square miles of land between Philadelphia and New York City, incorporating twelve municipalities including Princeton and Trenton.

The New Jersey Legislature established Mercer County in 1838 by combining portions of Burlington, Hunterdon, and Middlesex counties into a new administrative region.

Princeton University, located within Mercer County, maintains extensive research facilities and academic departments that contribute to scientific and educational advancement.

The county connects to major transportation routes through Interstate 95, multiple train stations on the Northeast Corridor Line, and Trenton Mercer Airport.

Baldpate Mountain rises 480 feet above sea level, marking the highest elevation point in Mercer County and providing views of the Delaware River valley.

Location: New Jersey

Inception: 1838

Capital city: Trenton

Elevation above the sea: 16 m

Shares border with: Somerset County, Middlesex County, Monmouth County, Burlington County, Bucks County, Hunterdon County

Website: http://mercercounty.org

GPS coordinates: 40.28072,-74.70337

Latest update: May 28, 2025 18:26

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