NAICS 541810 · Illinois
Advertising Agencies Business Names in Illinois
Illinois has 645 advertising agencies locations, ranking #5 of 51 states and D.C. and making up 4.3% of the U.S. total.
Name ideas for a Illinois advertising agencies business
Before you commit, search the Illinois business entity database (linked below) to make sure the name is not already registered there.
Advertising Agencies in Illinois by the numbers
Locations by number of employees in Illinois
Source: U.S. Census Bureau, County Business Patterns 2022. Counts cover employer establishments (businesses with paid employees); self-employed owners without staff are not included. Small establishments with 1–4 employees include those that reported no paid employees in mid-March.
Register your business name in Illinois
In most states you check name availability and form an LLC or corporation through the Secretary of State (or equivalent) office, then register with the state tax and labor agencies if you will collect sales tax or hire employees. Official Illinois links:
- Registration, Licenses, and Permits
- Secretary of State
- Illinois Department of Revenue - Businesses
- Department of Employment Security
- Illinois state website
- Illinois - Business
- Step-by-Step Guide to Starting a Business in Illinois
- Illinois Department of Commerce and Economic Opportunity
- New Hire Registry
- Small Business Administration - Illinois
- State Agency List
- Selling to the State of Illinois
- Illinois Compiled Statutes
Official state agency links as listed by the IRS on its Illinois state links page. Filing fees and steps change, so confirm current requirements with the agency before you file.
Other states for advertising agencies
See the national advertising agencies page → · Top industries in Illinois →