Individuals doing business in Lake County under an assumed business name are required by law to register the business name with the Lake County Clerk's office. This requirement includes registration for sole proprietorships and general partnerships. Professional Corporations (P.C.) shall file with the County Clerk under the Assumed Name law.

Limited Partnerships, Limited Liability Companies (LLC) and Corporations file with:

Illinois Secretary of State,
Department Business Services
328 Howlett Bldg
Springfield, IL 62756
Corporations - 217.782.6961
Limited Partnerships - 217.785.8960.

Lake County does not issue general permits or licenses to operate a business. Contact the city or village in which the business is located for local licensing requirements.

You may print the following Assumed Business Name Application as well as filing instructions and a publisher's list for legal notices. Maintenance forms are also available.

Assumed Business Name Application
      (PDF format 33KB)

Assumed Business Name Filing Instructions
      (PDF format 40K) 

 Assumed Business Name Supplementary Filing Instructions
      (PDF format 35K)

Publisher's List for Legal Notices
      (PDF format 16KB)

Addition of Owner(s) to Business
     (PDF format 31KB) 

Change of Owners' Legal Name or Address or Business Address Change or Addition
      (PDF format 39KB) 

Withdrawal of Owner(s) or Cancellation
      (PDF format 26KB)

If you are unable to print the above information or to receive an Assumed Business Name packet, e-mail your request and mailing address to our Vital Records Department or call 847.377.2280.

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