About New Castle County
New Castle County is a county in Delaware (DE) with a population of approximately 578,592 residents. The county seat is .
New Castle County is one of the counties that make up Delaware, providing local government services including law enforcement, property records, courts, and public infrastructure to its residents.
County Details
- County
- New Castle County
- State
- Delaware (DE)
- Population
- 578,592
- County Seat
Local Government
New Castle County residents are served by county-level government that typically includes:
- County commission or board of supervisors — Elected officials responsible for county governance, budgets, and policy
- Sheriff's office — Provides law enforcement services throughout New Castle County
- County clerk — Manages vital records, elections, and property records
- County courts — The judicial branch serving New Castle County residents
- Tax assessor — Handles property tax assessments and collections
Getting Involved
Residents of New Castle County can participate in local government by attending county commission meetings, voting in local elections, and contacting their county and state representatives. Find your elected officials by browsing the Delaware representatives page.
Frequently Asked Questions
What is the population of New Castle County?
New Castle County has an approximate population of 578,592 residents.
What is the county seat of New Castle County?
The county seat of New Castle County is .
What state is New Castle County in?
New Castle County is located in Delaware (DE).