Businesses in Boulder County, Colorado

As of October 16, 2026, ListRiver's records show 61,351 active registered businesses in Boulder County, Colorado, the 5th most among Colorado counties. 79% are LLCs. 566 were formed in September 2026. That is 7% of all Colorado businesses on record.

From official Colorado registry records, updated weekly. Look up a Colorado business by name.

Businesses on record
61,351
Formed in the last 12 months
8,149
Formed in September
566
With a phone number
6%
3,464 records

New Boulder County businesses per month

05001,000Oct 2024: 434Oct 24Nov 2024: 408Dec 2024: 411Jan 2025: 6202025Feb 2025: 421Mar 2025: 372Apr 2025: 418May 2025: 389Jun 2025: 367Jul 2025: 312Aug 2025: 628Sep 2025: 553Oct 2025: 618Nov 2025: 548Dec 2025: 560Jan 2026: 8762026Feb 2026: 672Mar 2026: 762Apr 2026: 725May 2026: 750Jun 2026: 672Jul 2026: 645Aug 2026: 755Sep 2026: 566

Businesses on record by formation month, through September 2026. Monthly Colorado new-business reports · Get the list of 566 new businesses formed in September 2026

Entity types

  • LLCs48,244 · 79%
  • Corporations8,641 · 14%
  • Nonprofits3,677 · 6%
  • Limited partnerships385 · 1%
  • Other220 · 0%
  • LLPs184 · 0%

Top cities

Top ZIP codes

Newest business names registered in Boulder County

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BusinessCityTypeFormed
Name hiddenBoulderLLCOct 2026
Name hiddenBoulderCorporationOct 2026
Name hiddenBoulderCorporationOct 2026
Name hiddenLafayetteLLCOct 2026
Name hiddenBoulderLLCOct 2026
Name hiddenBoulderLLCOct 2026
Name hiddenBoulderLLCOct 2026
Name hiddenLongmontLLCOct 2026
Name hiddenSuperiorLLCOct 2026
Name hiddenLongmontNonprofitOct 2026
Name hiddenBoulderLLCOct 2026
Name hiddenSuperiorLLCOct 2026
Name hiddenBoulderLLCOct 2026
Name hiddenBoulderCorporationOct 2026
Name hiddenLouisvilleLLCOct 2026
Name hiddenLouisvilleLLCOct 2026
Name hiddenBoulderLLCOct 2026
Name hiddenSuperiorLLCOct 2026
Name hiddenLouisvilleLLCOct 2026
Name hiddenLafayetteLLCOct 2026
Name hiddenSuperiorLLCOct 2026
Name hiddenLongmontLLCOct 2026
Name hiddenBoulderLLCOct 2026
Name hiddenLongmontLLCOct 2026
Name hiddenLouisvilleCorporationOct 2026

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Common questions about Boulder County businesses

How many businesses are registered in Boulder County, Colorado?

ListRiver has 61,351 active registered businesses in Boulder County, Colorado on record as of October 16, 2026, from official Colorado business registry data. Dissolved and defunct businesses are not counted.

How many new businesses were formed in Boulder County, Colorado in September 2026?

566 businesses on record in Boulder County, Colorado were formed in September 2026.

How many new businesses opened in Boulder County, Colorado in the last 12 months?

8,149 businesses on record in Boulder County, Colorado were formed in the 12 months through September 2026.

What is the most common type of business in Boulder County, Colorado?

LLCs are the most common: 48,244 of 61,351 businesses on record (79%), followed by Corporations with 8,641 (14%).

Where does this data come from?

From Colorado's official business registry. ListRiver loads each new state file, standardizes it, removes duplicates and updates its database weekly. Email and industry details are added from SMBCredit.net where available.

How do I get a list of businesses in Boulder County, Colorado?

Use ListRiver's list builder to filter Boulder County, Colorado businesses by entity type, formation date, industry and contact details, see the exact count and price, and download a CSV. Every list includes monthly refresh files.

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About this data

Counts come from official Colorado business registry records on file with ListRiver, current as of October 16, 2026. They include businesses that are active on the state register; dissolved and defunct entities are excluded. Contact details are added from SMBCredit.net where available. Formation months reflect the registration date the state reports. See the methodology for sources, update schedules and known limits.