AreaVibes reveals the best places to live in Delaware for 2016 using our Livability Score. The Livability Score for each city in Delaware is calculated out of 100 from a unique algorithm based on various metrics, including: amenities, cost of living, crime, education, employment, housing and weather. Delaware has a population of 900,131 and a population density of 368.3 people per square mile. The capital city is Dover and the largest city in Delaware is Wilmington. To filter the results, use the dropdown options to sort by population or category.