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Welcome to New Castle County ...

Time Zone: New Castle County lies in the Eastern Time Zone (EST/EDT) and observes daylight saving time.

The community of Wilmington is the Seat for New Castle County.

New Castle County was founded in 1664.

From the Census Estimates for 2019, <1> New Castle had a population of 558,753 people. This is an increase of 3.71% since the last Census (which gave a population of 538,752 people in 2010).

At the time of the 2010 Census, New Castle represented 60% of the total population of Delaware.

Below are some of the communities located in New Castle County:

  • Arden
    (10 miles [16.1 km] to the northeast)
    • Arden is located in New Castle County (DE)
    • Jump to our Gazetteer entry for Arden
    • Population from the 2020 Census: 436 people
    • Jump to TripAdvisor's Tourism page for Arden <2>
  • Ardencroft
    (10 miles [16.1 km] to the northeast)
    • Ardencroft is located in New Castle County (DE)
    • Jump to our Gazetteer entry for Ardencroft
    • Population from the 2020 Census: 218 people
  • Ardentown
    (10 miles [16.1 km] to the northeast)
    • Ardentown is located in New Castle County (DE)
    • Jump to our Gazetteer entry for Ardentown
    • Population from the 2020 Census: 274 people
  • Bellefonte
    (7 miles [11.3 km] to the northeast)
    • Bellefonte is located in New Castle County (DE)
    • Jump to our Gazetteer entry for Bellefonte
    • Population from the 2020 Census: 1,166 people
  • Delaware City
    (8 miles [12.9 km] to the south)
  • Elsmere
    (3 miles [4.8 km] to the north)
    • Elsmere is located in New Castle County (DE)
    • Jump to our Gazetteer entry for Elsmere
    • Population from the 2020 Census: 5,761 people
  • Middletown
    (17 miles [27.4 km] to the south)
    • Middletown is located in New Castle County (DE)
    • Jump to our Gazetteer entry for Middletown
    • Population from the 2020 Census: 23,765 people
    • Jump to TripAdvisor's Tourism page for Middletown <2>
  • New Castle
    (3 miles [4.8 km] to the southeast)
  • Continue List   (5 more) ...
    • Newark
      (7 miles [11.3 km] to the west)
      • Newark is located in New Castle County (DE)
      • Jump to our Gazetteer entry for Newark
      • Population from the 2020 Census: 33,849 people
      • Jump to TripAdvisor's Tourism page for Newark <2>
    • Newport
      (Less than 2 miles to the north)
      • Newport is located in New Castle County (DE)
      • Jump to our Gazetteer entry for Newport
      • Population from the 2020 Census: 874 people
      • Jump to TripAdvisor's Tourism page for Newport <2>
    • Odessa
      (16 miles [25.7 km] to the south)
      • Odessa is located in New Castle County (DE)
      • Jump to our Gazetteer entry for Odessa
      • Population from the 2020 Census: 354 people
      • Jump to TripAdvisor's Tourism page for Odessa <2>
    • Townsend
      (21 miles [33.8 km] to the south)
      • Townsend is located in New Castle County (DE)
      • Jump to our Gazetteer entry for Townsend
      • Population from the 2020 Census: 2,764 people
      • Jump to TripAdvisor's Tourism page for Townsend <2>
    • Wilmington
      (4 miles [6.4 km] to the northeast)
      • Wilmington is located in New Castle County (DE)
      • Jump to our Gazetteer entry for Wilmington
      • Population from the 2020 Census: 70,376 people
      • Jump to TripAdvisor's Tourism page for Wilmington <2>

Websites of Interest ...

Footnotes ...

<1>On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2010 Census and the next count will be for the 2020 Census.
<2>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.