Illinois LLC Name Search

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The first step to forming an LLC in Illinois is to search your desired LLC name and make sure it’s available for use.

Illinois LLC Name Requirements

Before searching your LLC name in Illinois, there are a few requirements you need to know:

  1. LLC namesThe abbreviations “LLC” or “L.L.C.” must be used at the end of your Illinois LLC name. (“LLC” is the most common.)
  2. Because an Illinois LLC is not a Corporation, your desired LLC name cannot use the word “Corporation”, “Incorporated,” or their abbreviations (“Corp.”, “Inc.”).
  3. Your desired LLC name must be distinguishable. This means it must be different and unique from all other businesses registered in Illinois.

Differences in designators (the identifiers at the end of a business name) and differences in grammar do not create distinguishability.

For example:

  • LLC, L.L.C., Inc., Corp.
  • singular, plural, and possessive
  • A, An, The
  • and, or, &
  • hyphens, slashes, periods, commas
  • three vs. 3

The following examples are NOT distinguishable:

  • Smith Investments, LLC vs. Smith Investments, Inc.
  • Apple Farm, LLC vs. Apple Farms, LLC
  • Print Shop, LLC vs. The Print Shop, LLC
  • Night & Day, LLC vs. Night and Day, LLC
  • Peter Paul & Mary Studios, LLC vs. Peter-Paul-Mary Studios, Inc
  • Three Teachers Consulting, LLC vs. 3 Teachers Consulting, LLC

Searching the Illinois Name Database

1. Go to the Illinois Secretary of State: Business Entity Search.

2. Select “Name” for the Search Method, and enter your desired LLC name in the search box. Then click “Continue”.

  • Leave out the ending “LLC” and any punctuation.
  • Capitalization doesn’t matter.
  • To be thorough, just enter the first word or two of your LLC name to ensure you see everything that is potentially similar.
    • (Ex: if your desired Illinois LLC name is “Johnny Apple Farm LLC”, just enter “Johnny Apple”).
  • To be even more thorough, you can enter just a part of the first word.
    • (Ex: if your desired Illinois LLC name is “Print Shop & Supplies LLC”, just enter “print”).

3. Click the “Submit” button and browse the list of existing Illinois businesses:

  • If a “no results found” message appears, that means your desired LLC name is available for use.
  • If the results show names that are not too similar to yours (meaning yours is distinguishable), then your desired LLC name is available for use.
  • If your desired LLC name appears in the list exactly as you want it, your desired LLC name is not available for use. You’ll need to think of a new name or use some creativity and come up with a unique variation.
  • If the results show a name that is deceptively similar to your desired LLC name, your desired LLC name is not available for use. You’ll need to think of a new name or use some creativity and come up with a unique variation.

And check out TRUIC’s business name generator if you need help coming up with an LLC name.

Illinois Secretary of State Contact Info

If you have any questions, you can contact the Illinois Secretary of State at 217-782-6961. Dial extension 7736 for the Limited Liability Department.

If you can’t get through on the above number, just call 217-782-6875 and ask to be transferred to the Limited Liability Department.

How do I change my LLC name?

You can change your LLC’s name later by filing an Amendment form with the Secretary of State.

We have step-by-step instructions on how to change an LLC name in Illinois.

Matt Horwitz
Matt Horwitz
Founder & Educator, LLC University®
Matt Horwitz has been the leading expert on LLC education for the past decade. He founded LLC University in 2010 after realizing people needed simple and actionable instructions to start an LLC that other companies weren't offering. He's cited by Entrepreneur Magazine, Yahoo Finance, and the US Chamber of Commerce, and was featured by CNBC and InventRight.
Matt holds a Bachelor's Degree in business from Drexel University with a concentration in business law. He performs extensive research and analysis to convert state laws into simple instructions anyone can follow to form their LLC - all for free! Read more about Matt Horwitz and LLC University.

5 comments on “Illinois Name Search”

Disclaimer: Nothing on this page shall be interpreted as legal or tax advice. Rules and regulations vary by location. They also change over time and are specific to your situation. Furthermore, this comment section is provided so people can share their thoughts and experience. Please consult a licensed professional if you have legal or tax questions.

  1. The name I would like to use comes up as an “INVOLUNTARY DISSOLUTION” on the status row when I click on the business name following these steps. Does that mean I can use the name of this since it looks like Illinois ordered to dissolve or when the court forces the sale of a company? Hope to hear back soon!

    • I ended up calling the Secretary of State’s office, for LLC’s that have INVOLUNTARY DISSOLUTION, three years must have passed before someone else can use the name again. Hope this helps incase someone has a question on it in the future.

      • Thanks so much for the update Thomas! I’m sure this will be helpful to other readers :)

  2. Thank you for this quality information. I wish I would have found you last year.


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