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New Castle County

Courts & Legal Offices in New Castle County

Most state-level courts serving New Castle County are located at the Leonard L. Williams Justice Center in Wilmington.

Office / Court Address Phone
Superior Court – New Castle County Leonard L. Williams Justice Center
500 North King Street
Wilmington, DE 19801
(302) 255-0800
Court of Common Pleas – New Castle County Leonard L. Williams Justice Center
500 North King Street
Wilmington, DE 19801
(302) 255-0948
Family Court – New Castle County Leonard L. Williams Justice Center
500 North King Street
Wilmington, DE 19801
(302) 255-0300
Justice of the Peace Court 11
(24‑hour criminal/traffic)
2 Penns Way, Suite 100
New Castle, DE 19720
(302) 577-1164
New Castle County Prothonotary (Superior Court Clerk) Leonard L. Williams Justice Center
500 North King Street, Suite 500 (L1)
Wilmington, DE 19801
(302) 255-0800
New Castle County Sheriff (Civil Process) Leonard L. Williams Justice Center
500 North King Street
Wilmington, DE 19801
(302) 395-8450

Always confirm hours, locations, and phone numbers on the official Delaware Courts website before appearing in person: Delaware Courts – Hours & Locations .

Legal Services in New Castle County, Delaware | DelawareLegal

Legal Services in New Castle County, Delaware

New Castle County is the northernmost and most populous county in Delaware, home to over 570,000 residents. Located in the Delaware Valley region, it includes the state's largest city, Wilmington, and serves as Delaware's economic and cultural hub.

Quick Facts: New Castle County

Attribute Value
Population (2023 est.) ~570,719
County Seat Wilmington
Largest City Wilmington
Median Household Income ~$73,000
Total Area 494 sq mi
Founded 1664

Population, income, and area estimates are based on recent public data from the U.S. Census Bureau and other government sources.

Why New Castle County Residents Need Legal Protection

As Delaware's most populous county and home to thousands of corporations, New Castle County residents face unique legal challenges:

  • Employment Issues: Workplace disputes are common in major corporate hubs.
  • Housing & Landlord-Tenant: High rental rates in Wilmington and Newark create frequent conflicts.
  • Traffic & Criminal Defense: The I‑95 and I‑495 corridors lead to high volumes of traffic violations.
  • Family Law: Divorce, custody, and child support cases are prevalent in suburban communities.
  • Estate Planning: Higher median incomes mean more residents need wills and trusts.

Cities & Communities in New Castle County

Wilmington
Newark
Middletown
New Castle
Bear
Glasgow
Pike Creek
Hockessin
Claymont
Elsmere
Newport
Brookside
Edgemoor
Arden
Bellefonte

Demographics & Economy

Population Distribution

Wilmington: ~71,000 (12.4%)
Newark: ~34,000 (6.0%)
Middletown: ~25,000 (4.4%)

Key Economic Sectors

  1. Financial Services: Banking, credit cards, and corporate law.
  2. Healthcare: ChristianaCare and Nemours Children's Hospital.
  3. Education: University of Delaware (Newark).
  4. Chemical & Pharmaceutical: DuPont and AstraZeneca.

Affordable Legal Protection for New Castle County Residents

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