In response to COVID-19, the Lake County Clerk’s office is open for walk-in customer service weekdays from 9 AM to 4:30 PM
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.
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.