Due to inclement weather, County Administrative Offices/non-essential will close at 2:30 p.m. today, Thursday, November 15, 2018.

All Branches of Mercer County Library System will close at 3:30 p.m.


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Welcome to Mercer County!

Dear Friends,

There’s so much to love about Mercer County! Rich in history, from the American Revolution to the Industrial Revolution, Mercer County continues to flourish today as a world-class center for business, education, research, arts and technology. Whether you visit our many historic sites, explore our thousands of acres of parks, take in a show, launch a business or study at one of our celebrated universities, you’ll agree. Mercer County has it all. Mercer County, New Jersey. Still Making History!


Brian M. Hughes, County Executive

12 Riverwalk arches