Mercer County NJ Map
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Mercer County Facts
Mercer County has some fantastic history! Below are some quick facts about the county. The last entry is an events page which includes fun things to do throughout the year.
- YEAR FORMED: 1838
- COUNTY SEAT: Trenton
- TOTAL AREA: 229 Sq Miles
- POPULATION: 367,063
- Mercer County Events
Mercer County Area Codes
All area codes | 201 | 609 | 732 | 908 |
Mercer County Zip Codes
08520, 08525, 08534, 08540, 08541, 08542, 08543, 08544, 08550, 08560, 08561, 08601, 08602, 08603, 08604, 08605, 08606, 08607, 08608, 08609, 08610, 08611, 08618, 08619, 08620, 08625, 08628, 08629, 08638, 08645, 08646, 08647, 08648, 08650, 08666, 08690, 08691, 08695, 08690, 08691, 08695