County Mercer is located in the state of New Jersey. Mercer is spread between the coordinates of +40.2977946 Latitude and -74.53993740 Longitude. Mercer has 39 zip codes, 21 cities, 1 area code and 25 post offices.
Below you will find more info about Mercer and also zip codes, cities, area codes and the post offices that belong to this county.