How to Look Up an LLC in Colorado? (The MOST Effective Way)
Searching for a business name in Colorado isn't complicated — but there are a few steps worth knowing before you dive in. We've spent over a decade helping business owners run LLC searches and navigate the Colorado Secretary of State website, so we know exactly where people get stuck.
Below, we'll walk you through how to search for an LLC in Colorado using the Secretary of State's database — based on what we've learned from helping hundreds of founders do exactly this.
We'll flag the shortcuts and the common mistakes along the way, so you can find what you need fast.
Quick Summary
- To look up an LLC in Colorado, use the Colorado Secretary of State's website, which offers a business entity search tool that's free and publicly accessible.
- Alternative methods include calling the state's office directly or emailing for more specific inquiries.
- In Colorado, 99.5% of all businesses are small businesses — that's 653,639 entities total, which tells you just how busy this database gets.
- In my experience, pairing the online search with a quick phone or email follow-up gives you the most complete picture of an LLC's status in Colorado.
How Do I Look up an LLC in Colorado?

There are a few ways to run an LLC search in Colorado. The online route is fastest, but it helps to know which search method fits your situation.
When I first used the Colorado Secretary of State's website to look up an LLC, I'll admit the interface felt a little clunky. But once you know where to go, it's actually one of the more reliable state databases out there. I've used it dozens of times since.
Worth knowing: Colorado's business community is growing fast. According to the US Small Business Administration, 32,069 new establishments opened between March 2021 and March 2022 [1]. That's a lot of new names hitting the database — which is exactly why checking early matters.
1. Use the Colorado Secretary of State Search Tool
Start at the Secretary of State's website. From there, the Business Entity Search tool gives you access to registration details — including document numbers, status, and registered agent info — for any entity on record in Colorado.
Here's how to run the search, depending on what information you have.
a. Name Search
If you know the name of the LLC, this is the fastest option:
- Step 1: Visit the Colorado Secretary of State's website.
- Step 2: Go to the Business section and select 'Search Business Database.'
- Step 3: Type the LLC name into the search bar. The search isn't case-sensitive, so don't worry about formatting.
- Step 4: Click through the results to find the entity you're after. The detail page will show you formation date, current status, and registered agent information.
b. Entity Number
Got the entity number? This gets you there even faster:
- Step 1: Enter the entity number directly into the search bar on the Business Database Search page.
- Step 2: You'll land straight on the LLC's detail page — no sifting through results needed.
c. Executive Name
If you're trying to find every LLC tied to a specific person, use the advanced search:
- Step 1: Select the 'Advanced Search' option on the search page.
- Step 2: Enter the executive's name in the appropriate field. You'll get a list of every LLC in the state connected to that individual.
2. Call the State
There was a moment when online resources just weren't enough for my specific query. Picking up the phone and calling the Colorado Secretary of State's office not only cleared my confusion but also provided me with insights I hadn't considered.
The person on the line was more than willing to walk me through the details, making the experience surprisingly pleasant.
The number for business inquiries is 303-894-2200, and the working hours are 8:00 AM - 5:00 PM, Monday to Friday.
3. Send an Email
A few times when I had a complex question, I emailed the Colorado Secretary of State's office. The response I received was not only prompt but also thorough, providing me with clarity and written confirmation of the information I needed.
"You can also look up an LLC by calling the State's office or emailing them."
- LJ Viveros, Distinguished Growth & M&A Transition Advisor, Former General Manager
The appropriate email address for business entity inquiries is business@coloradosos.gov. Make sure to include details about your search query in your email to receive the most accurate information.
4. Other Business Entity Search Alternatives
You can also use these options for a more comprehensive search:
- Company Naming Services: Use online platforms that assess the availability and potential for registering business names.
- Trademark Searches: Verify that the business name is not already trademarked at the state level in Illinois or on a national scale.
- Social Media Platforms: Investigate active companies and evaluate their online presence and engagement with the public.
- Search Engines: Conduct broad searches to uncover information on business operations, media coverage, and accessible public records.
- Domain Name Searches: Check if the preferred business name is open for registration as an internet domain, ensuring online brand consistency.
Now that you know how to look up an LLC in Colorado, let's answer some of the most common questions about businesses in the state.
Related Articles:
- How to Dissolve an LLC in Colorado
- LLC Formation Services in Colorado
- Best Registered Agent Services in Colorado
- How Much Does it Cost to Start an LLC in Colorado
How to Check If A Business Name Is Trademarked in Colorado

Finding out a name is available in Colorado's business database is only part of the picture. You'll also want to run a trademark check — both federally and at the state level — before you commit to it.
Federal Trademark Check (Through the USPTO)
The USPTO maintains a publicly searchable database of federally registered trademarks [2]. Here's how to use it:
- Visit the USPTO Website: Head to the official USPTO site and go to the trademarks section.
- Use the Trademark Electronic Search System (TESS): TESS lets you search registered trademarks and pending applications — both matter, since a pending application can still block your registration.
- Run Your Search: You can search by name, owner, serial number, or registration number. Start with a basic word mark search for your business name.
- Dig Into the Results: Look for anything identical or close to your proposed name. Check the goods and services listed — a conflict is more likely if another business operates in the same space.
State Trademark Check (SOT Website)
State trademark registration runs separately from the federal system. Here's how to check Colorado specifically:
- Visit the State's Secretary of State Website: Go to Colorado's official SOS site and look for the business or trademark search section.
- Access the State Trademark Database: Colorado offers an online search tool for state-registered marks. Use it before you assume your name is clear.
- Run Your Search: Enter the name you're considering. Search a few variations too — slight spelling differences can still create legal headaches down the road.
- Review the Results: Same logic as the federal search — look for anything that overlaps with your name and operates in a similar category.
Reasons to Perform a Search
Here are all the reasons individuals should perform an LLC search:
FAQs
What Is the Purpose of an LLC?
The purpose of an LLC is to provide limited liability protection to its members. This means that the members' personal assets are protected in the event that the LLC is sued.
Running a thorough Colorado business name search before you file your LLC is one of those things I've seen first-time founders skip — and regret later. A quick search now saves you from having to rebrand after you've already printed business cards and built a website.
The Colorado Secretary of State's database is free, takes about five minutes, and tells you most of what you need to know. Pair it with a USPTO search and you're covered on both fronts.
References:
- https://advocacy.sba.gov/wp-content/uploads/2023/11/2023-Small-Business-Economic-Profile-CO.pdf
- https://www.uspto.gov/about-us/uspto-locations/rocky-mountain-regional-office-colorado