Colorado LLC Name Search
Check if your LLC name is available in Colorado before you file. Here is how to search the Colorado Secretary of State database, the naming rules, and how to reserve a name.
Search Colorado LLC names →How to search for LLC names in Colorado
Searching for an available LLC name in Colorado is a necessary first step before submitting your Articles of Organization to the Colorado Secretary of State. The state's online Business Entity Search database lets you check whether a name is already registered to an active or inactive entity, giving you a real-time look at what's on file. A name that returns no results is likely available, but a clear search result is not a legal guarantee — the Secretary of State makes no formal determination of availability until your filing is reviewed. Checking thoroughly before you file helps you avoid rejection fees and delays. The database includes LLCs, corporations, trade names, and other registered entities, so you can spot conflicts across business types, not just among other LLCs.
Step-by-step: using the Colorado Secretary of State name search
- 1. Go to the Colorado Secretary of State Business Entity Search at https://www.sos.state.co.us/biz/BusinessEntityCriteriaExt.do
- 2. In the 'Entity Name' field, type the name you want to use for your LLC — you can enter a partial name to see all similar registrations in the system
- 3. Use the 'Entity Type' dropdown to filter results, or leave it set to 'All' to see conflicts across corporations, LLCs, trade names, and other entity types simultaneously
- 4. Click 'Search' and review the full list of results, paying close attention to names that sound similar, use common misspellings of your name, or differ only by punctuation or the LLC designator
- 5. Click on any similar entity name in the results to view its status (active, delinquent, dissolved) — even a delinquent or dissolved entity may block your name if the Colorado Secretary of State considers it insufficiently distinguishable
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Colorado LLC naming rules
- Your LLC name must include one of the following designators: 'Limited Liability Company', 'LLC', or 'L.L.C.' — abbreviations are acceptable and commonly used
- The name must be distinguishable from all other business entity names already on file with the Colorado Secretary of State, including corporations, limited partnerships, and trade names
- Your LLC name cannot contain language that implies the entity is a government agency, such as 'State Department', 'Federal', 'United States', or similar terms
- Words like 'Bank', 'Banking', 'Insurance', 'Trust', 'Cooperative', and similar regulated-industry terms require written approval from the relevant Colorado state regulatory agency before the name can be accepted
- Professional service designators such as 'Attorney', 'Doctor', 'Engineer', or 'Architect' may require that the LLC members hold the appropriate professional licenses in Colorado
- The name cannot include obscene language or terms that are misleading to the public about the nature or purpose of the business
- Colorado does not permit names that are deceptively similar to well-known trade names or that could mislead consumers into associating the LLC with a different, established business
- Punctuation differences alone — such as an ampersand vs. 'and', or a comma vs. no comma — are generally not sufficient to make a name distinguishable under Colorado rules
Restricted words in Colorado LLC names
The following words require special approval from a state agency before you can use them in your Colorado LLC name:
- Bank / Banking / Banker — requires approval from the Colorado Division of Banking
- Insurance / Insurer / Underwriter — requires approval from the Colorado Division of Insurance
- Trust / Trustee — requires approval from the Colorado Division of Banking or Division of Financial Services
- University / College — requires approval from the Colorado Department of Higher Education
- Attorney / Law / Legal — may require that members are licensed to practice law in Colorado
- Engineer / Engineering — may require licensure through the Colorado State Board of Licensure for Architects, Professional Engineers, and Professional Land Surveyors
- Cooperative / Co-op — implies a specific legal structure regulated separately under Colorado cooperative statutes
- Federal / National / United States / State of Colorado — implies government affiliation and is generally prohibited without authorization
How to reserve an LLC name in Colorado
Colorado allows you to reserve an LLC name before filing by submitting a Statement of Reservation of Name through the Secretary of State's online portal. The filing fee is $25. A reservation holds the name exclusively for 120 days. You cannot renew or extend the same reservation, but you may file a new reservation for an additional 120-day period if you need more time before filing your Articles of Organization.
Tips for choosing an LLC name that passes in Colorado
- Search your exact intended name and then run a second search using common misspellings or phonetic equivalents — Colorado's distinguishability standard covers names that sound alike, not just identical spellings
- Run a parallel search on the USPTO federal trademark database at https://tmsearch.uspto.gov to make sure your chosen name does not infringe on a registered trademark, which is a separate legal risk beyond state registration
- Check domain name availability at the same time you search the SOS database — securing a matching .com domain early is practical even if your business operates locally
- Avoid names that are heavily geographic, such as 'Denver Tech Solutions LLC', if you plan to expand outside the city or state, since the name may feel limiting or conflict with other regional businesses later
- Consider whether your name will still make sense if you add a product line or pivot your services — overly narrow names tied to one product or niche can create rebranding costs down the road
- If the name you want is taken by a delinquent or dissolved entity, contact the Colorado Secretary of State's office directly to ask about the timeline for that name becoming available, rather than assuming it is off-limits permanently
Colorado LLC name search: frequently asked questions
How do I do a Colorado LLC name search?
You can search for available LLC names using the Colorado Secretary of State's free Business Entity Search tool at https://www.sos.state.co.us/biz/BusinessEntityCriteriaExt.do. Enter your proposed name in the Entity Name field and review the results for any existing registrations that could conflict with your choice. It is best to search both the exact name and variations, since Colorado requires all LLC names to be distinguishable from existing entities on file. The search is available 24/7 at no cost.
How do I check LLC name availability in Colorado?
To check LLC name availability in Colorado, visit the Secretary of State's Business Entity Search portal and enter your proposed name. Review all results carefully, including inactive and delinquent entities, since those may still block your registration if your name is not sufficiently distinguishable. A search with no matching results suggests the name is likely available, but availability is only confirmed when the Secretary of State approves your filed Articles of Organization. For added certainty, you can reserve the name for $25 before filing.
What are the naming rules for a Colorado LLC?
Colorado LLC names must include a designator such as 'LLC', 'L.L.C.', or 'Limited Liability Company' and must be distinguishable from all other entities already registered with the Colorado Secretary of State. The name cannot imply government affiliation, use regulated terms like 'Bank' or 'Insurance' without agency approval, or include obscene or misleading language. Colorado's distinguishability standard is strict — differences in punctuation or minor word variations alone are generally not enough to qualify a name as unique.
How do I reserve an LLC name in Colorado?
You can reserve a Colorado LLC name by filing a Statement of Reservation of Name through the Colorado Secretary of State's online portal and paying a $25 fee. The reservation holds the name exclusively for 120 days while you prepare your filing. Reservations cannot be extended, but you may file a new reservation immediately after the first one expires if you need additional time. Name reservations are especially useful if you are not ready to file your Articles of Organization right away but want to lock in a specific name.
What if my LLC name is already taken in Colorado?
If your preferred LLC name is already in use, you will need to choose a name that is sufficiently distinguishable from the existing entity under Colorado law. Minor changes like adding punctuation or swapping 'and' for '&' will generally not be enough — you should consider a meaningfully different name or add a distinctive word or phrase. If the conflicting entity is dissolved or delinquent, contact the Colorado Secretary of State's office to find out whether the name may become available and when. You can also check whether the existing entity might be open to a written consent agreement, though Colorado does not formally provide for this process in all cases.
Does a Colorado LLC name need to include 'LLC'?
Yes, Colorado law requires that every LLC name include a designator that identifies it as a limited liability company. Acceptable designators are 'Limited Liability Company', 'LLC', or 'L.L.C.' — all three are equally valid and the abbreviated forms are the most commonly used. The designator must appear as part of the official registered name on all state filings. You may use a separate trade name or DBA for branding purposes if you prefer a name without the LLC designator for marketing use.