DuPage County Business Name Search (Illinois)

Search for DuPage County, IL 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 Town or City Hall provides administrative services for the local DuPage County community, including business services such as registering local businesses or processing applications for business licenses. Towns and City Halls in DuPage County, Illinois 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 DuPage 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 DuPage 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.

Darien City Hall Darien IL 1702 Plainfield Road 60561 630-852-5000

Elmhurst City Hall Elmhurst IL 209 North York Street 60126 630-530-3000

Naperville City Hall Naperville IL 400 South Eagle Street 60540 630-420-6111

Warrenville City Hall Warrenville IL 3S258 Manning Ave 60555 630-393-9427

West Chicago City Hall West Chicago IL 475 Main St 60185 630-293-2200

Wheaton City Hall Wheaton IL 303 West Wesley Street 60187 630-260-2000

Wood Dale City Hall Wood Dale IL Frnt 1, 404 N Wood Dale Rd 60191 630-766-4900


A Secretary of State operates at the Illinois State level to carry out elections, supervise state administration, and act as the Illinois chief corporations officer. As part of this responsibility, many Secretaries of State in DuPage County register and license private corporations, small businesses, and other businesses, including registering trade names. Secretaries of State are often responsible for managing businesses that operate within Illinois, including collecting business taxes. A DuPage County business name search through the Secretary of State Office can identify business names for sole proprietors, partnerships, corporations, limited partnerships, or limited liability companies. This search can also identify the owner of a DuPage County business as well as any trademarked business names. Many Secretaries of State provide online access to their business name search databases.

Lombard Illinois Secretary of State Lombard IL 837 South Westmore-Meyers Road 60148 630-629-8305

Naperville Illinois Secretary of State Naperville IL 931 West 75th Street 60565 312-793-1010

Oak Brook Illinois Secretary of State Oak Brook IL 2001 Midwest Road 60523 630-424-2564

Wheaton Illinois Secretary of State Wheaton IL 128 West Liberty Drive 60187 312-793-1010