New Castle
DE flag

New Castle

County

Details

GEOID
10003
State
DE
Population
588,026 (2025 est.)
Data Source
Census tiger
Center Coordinates
39.5783, -75.639

Geographic Boundary

Data Completeness

60% (6/10)
Geographic boundary
Center coordinates
Wikipedia link
Budget link
Agencies (8)
Services
Legislative bodies
Elected officials (5)
State abbreviation
Parent jurisdiction

Agencies (8)

New Castle County Department of Public Works

Executive New Castle

Responsible for county infrastructure including roads, sewer systems, stormwater management, and facilities maintenance.

New Castle County Police Department

Public_safety New Castle

Primary law enforcement agency for unincorporated New Castle County, the largest law enforcement agency in Delaware by officer count.

New Castle County Sheriff's Office

Public_safety New Castle

County Sheriff's Office responsible for court security, warrant service, and civil process serving in New Castle County.

New Castle County Department of Community Services

Executive New Castle

Provides community development, housing, community resources, library services, and programs to strengthen families and neighborhoods.

New Castle County Department of Law

Judicial New Castle

County legal department providing litigation, legal counsel, contract administration, and workers' compensation services for New Castle County government.

New Castle County Department of Land Use

Executive New Castle

Manages land use planning, zoning, permitting, inspections, and code enforcement for New Castle County.

New Castle County Council

Legislative New Castle

Legislative branch of New Castle County government, consisting of 13 members: 12 elected from districts and 1 Council President elected at-large.

New Castle County Executive's Office

Executive New Castle

Office of the County Executive, the chief executive officer of New Castle County, Delaware's largest county by population.