{"id":6256,"date":"2023-07-24T10:01:03","date_gmt":"2023-07-24T10:01:03","guid":{"rendered":"https:\/\/townsvillages.com\/us\/?p=6256"},"modified":"2026-08-11T21:32:50","modified_gmt":"2026-08-11T21:32:50","slug":"mercer-county-new-jersey","status":"publish","type":"post","link":"https:\/\/townsvillages.com\/us\/mercer-county-new-jersey\/","title":{"rendered":"Mercer County, New Jersey"},"content":{"rendered":"

Mercer County is a county in New Jersey, United States, about 35 miles northeast of Philadelphia and 60 miles southwest of New York City. It had a population of 387,340 at the 2020 census, an estimated 399,289 by 2024, and covers 224.44 square miles (581.3 km2) of land centred near 40\u00b017\u2032N 74\u00b042\u2032W.<\/p>\n

Trenton is the county seat and New Jersey’s state capital; its postal code is 08608. The county holds 12 municipalities — 1 city, 4 boroughs and 7 townships — the fewest of any county in New Jersey, tied with Hudson County, and it runs on Eastern Time.<\/p>\n

Towns & Villages in Mercer County<\/h2>\n

Mercer County has 12 municipalities on record, each its own incorporated local government — New Jersey has no unincorporated territory, so every address in the county falls inside one of these 12. Type follows New Jersey’s own municipal classifications: city, borough or township.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Place<\/th>\nType<\/th>\nPop.<\/th>\nZIP<\/th>\n<\/tr>\n<\/thead>\n
Hamilton Township<\/td>\nTownship<\/td>\n92,297<\/td>\n08610, 08619, 08620, 08629, 08650, 08690, 08691<\/td>\n<\/tr>\n
Trenton<\/td>\nCity · seat<\/td>\n90,871<\/td>\n08608, 08609, 08611, 08618–08620, 08625, 08628, 08629, 08638<\/td>\n<\/tr>\n
Ewing Township<\/td>\nTownship<\/td>\n37,264<\/td>\n08560, 08618, 08628, 08638<\/td>\n<\/tr>\n
Lawrence Township<\/td>\nTownship<\/td>\n33,077<\/td>\n08648<\/td>\n<\/tr>\n
East Windsor Township<\/td>\nTownship<\/td>\n30,045<\/td>\n08512, 08520<\/td>\n<\/tr>\n
Princeton<\/td>\nBorough<\/td>\n30,681<\/td>\n08540, 08541, 08542, 08543, 08544<\/td>\n<\/tr>\n
West Windsor Township<\/td>\nTownship<\/td>\n29,518<\/td>\n08540, 08550<\/td>\n<\/tr>\n
Hopewell Township<\/td>\nTownship<\/td>\n17,491<\/td>\n08525, 08534, 08560, 08691<\/td>\n<\/tr>\n
Robbinsville Township<\/td>\nTownship<\/td>\n15,476<\/td>\n08691<\/td>\n<\/tr>\n
Hightstown<\/td>\nBorough<\/td>\n5,900<\/td>\n08520<\/td>\n<\/tr>\n
Pennington<\/td>\nBorough<\/td>\n2,802<\/td>\n08534<\/td>\n<\/tr>\n
Hopewell Borough<\/td>\nBorough<\/td>\n1,918<\/td>\n08525<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Two municipality names are easy to confuse. Hopewell Township and Hopewell Borough are separate governments — the township physically surrounds the borough, plus Pennington, making them two of New Jersey’s 21 “doughnut town” pairs where one municipality completely encloses another. East Windsor Township and West Windsor Township are also unrelated except by name; they sit on opposite sides of Route 130’s Windsor crossroads and were both carved from the same original Windsor Township in the 19th century.<\/p>\n

ZIP Codes<\/h2>\n