Illinois Company Registrations

Registering a New Company in IllinoisIllinoisCountyMpa

There is no national registration of companies in the USA. All businesses are registered at the county or state level. Listed below is how to register in Illinois. The state or counties will not check (or care) if your name conflicts with names of other businesses in other states!

Sole Proprietorships and private partnerships are registered at the County level in Illinois. This includes Fictitious Business Name statements (also known as “DBA”s). In most cases the fee is under $50 and anyone can register a business simply by visiting your county’s business office and completing the right paperwork.

Corporations (both for-profit and non-profit), including C or S Corps, Limited Liability Partnerships (LLPs), and Limited Liability Corporations (LLC) are only valid when registered with the Secretary of State.

Secretary of State Department of Business Services
330 Howlett Building
Springfield, IL 62756
(217) 782-6961
Secretary of State Department of Business Services
69 W. Washington, Ste. 1137
Chicago, IL 60602
(312) 793-3380


NOTE: These notes are on registering the business only. You may also need a business license for any regulated businesses, and may also require city permits or licenses. These vary greatly from city to city.

Trademarks: Illinois does have its own trademarks and service marks. These provide you no protection outside the state, so Illinois also recommends proper federal trademark filings with the US Patent and Trademark office.

Save yourself time and money by having a full trademark search done first through a naming agency (like this one in this site) or through a low cost online legal service. If your trademark application is rejected, you will lose your filing fee.

Sales Tax: In Illinois retail sales tax is the same in all counties.  If you will be selling taxable good or services (which is often the case unless you only sell to resellers), you will need a tax id from the Illinois Department of Revenue.

IllinoisStateFlagSmlLargest Cities: Chicago, Springfield, Rockford, Joliet, Peoria, Champaign, Carbondale, East St Louis, Waukegan, Skokie, Evanston, Naperville, Decatur, Centralia, etc.

Brighter Naming has done extensive creative and process naming work and trademark checking for clients throughout Illinois, including all the major area codes which are 217, 224, 309, 312, 331, 618, 630, 708, 773, 779, 815, 847 and 872

“Illinois” is the modern spelling for the early French missionaries and explorers’ name for the Illinois natives, a name that was spelled in many different ways in the early records.
The state is known as The Land of Lincoln.

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Disclaimer: These are purely informational guidelines. For details in your particular case, please consult your lawyer, accountant or state/county office. Brighter Naming is not licensed to provide legal advice. The information here is provided as an informational service only.

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