New Castle County Business Name Search

Search for New Castle County DE business names. A business name search can help you choose a business name, register a business, identify a trade name, trademark a business name, name an LLC, look up business owners, check if a business name is available, license a business, and more.


A Department of Labor operates at the federal, Delaware State, or local New Castle County level to develop employment opportunities, ensure fair labor practices, and promote a competitive workforce. As part of this mission, the Department of Labor may be involved in licensing and registration for businesses under its jurisdiction, including registering business names in New Castle County. A New Castle County business name search through the Department of Labor can include business names for sole proprietors, partnerships, corporations, limited partnerships, or limited liability companies. This search can also identify the owner of a business and trademarked business names. Many Departments of Labor provide online access to business name search information.

Delaware Department of Labor Newark DE 225 Corporate Boulevard 19702 302-368-6600

Wilmington Delaware Department of Labor Wilmington DE 4425 North Market Street 19802 302-761-8001


A Town or City Hall provides administrative services for the local New Castle County community, including business services such as registering local businesses or processing applications for business licenses. Towns and City Halls in New Castle County Delaware may also be responsible for issuing trade names to local businesses. They may provide online access to a business name search so that people can identify New Castle County business names for sole proprietors, partnerships, corporations, limited partnerships, or limited liability companies. This search can also be used to identify the owner of a New Castle County business as well as any trademarked business names. Town and City Halls may provide an online searchable database of local business names and information.

Bellefonte Town Hall Wilmington DE 901 Rosedale Avenue 19809 302-761-9638

Delaware City Town Hall Delaware DE 407 Clinton Street 19706 302-834-4573

Elsmere Town Hall Wilmington DE 11 Poplar Avenue 19805 302-998-2215

Middletown Town Hall Middletown DE 19 West Green Street 19709 302-378-9120

New Castle City Hall New Castle DE 220 Delaware Street 19720 302-322-9812

Newark City Hall Newark DE 220 South Main Street 19711

Newport Town Hall Newport DE 226 North James Street 19804 302-994-6403

Townsend Town Hall Townsend DE 661 South Street 19734 302-378-8082