New Castle County is the richest county in Delaware. Wilmington is the largest city located within this county.
  The population of New Castle county is estimated at 557,851 where 434,798 speak English exclusively and 4,961 speak primarily in another language. In 2017 there were 6,531 births and 4,718 deaths in New Castle county. New Castle county has 108,007 housing units that are owned with a mortgage or a loan, 33,318 that are owned free and clear and 61,326 that are renter occupied.

  The upstanding residents of New Castle County filed 266,240 federal tax returns in 2017. This amount represents 58.4% of all Delaware filings and 0.179% of the entire nation. New Castle had an impressive combined total federal tax liability of $3,131,961,000 on earned income of $18,965,719,000. Other notable statistics from New Castle County were 10,340 unemployment claims which collected a total of $44,498,000 and 80,040 charitable contributions valued at $378,280,000. 84,680 filings from New Castle County paid a combined total of $280,375,000 in property taxes and 77,000 filings paid $645,649,000 on mortgage interest costs.

  In 2010 New Castle county had 413 religious congregations with an estimated 250,339 members.
35.7% of the New Castle population has a college level Bachelors degree or higher. 9.0% have less than a highschool diploma level education.

About 47% of New Castle County voted in the presidential election of 2016. This is an increase from the 2012 election by 9,508 votes.
At $66,839 the median income is 104.3% of the Delaware average. An estimated 13,330 people claimed to be unemployed last year in New Castle, the equivalant of around 4.5% of the county population. This represents an increase in the level of unemployment from the previous year's value of 4.4%.

Top 15 Industries in New Castle County.
Total # Employed	Industry Job Type
41,861	Health care and social assistance
33,352	Finance and insurance
30,756	Retail trade
23,045	Credit intermediation and related activities
20,628	Accommodation and food services
19,349	Food services and drinking places
16,939	Restaurants and other eating places
16,208	Administrative and support and waste management and remediation services
15,384	Administrative and support services
13,264	General medical and surgical hospitals
12,721	Manufacturing
12,710	Ambulatory health care services
12,448	Nondepository credit intermediation
10,847	Credit card issuing
10,400	Full-service restaurants

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