AreaVibes reveals the best places to live in New Jersey for 2016 using our Livability Score. The Livability Score for each city in New Jersey is calculated out of 100 from a unique algorithm based on various metrics, including: amenities, cost of living, crime, education, employment, housing and weather. New Jersey has a population of 8,874,374 and a population density of 1.0 people per square mile. The capital city is Trenton and the largest city in New Jersey is Newark. To filter the results, use the dropdown options to sort by population or category.