Businesses in Mill Valley, California

As of October 12, 2026, ListRiver's records show 5,007 active registered businesses in Mill Valley, California. 61% are LLCs. 1 were formed in September 2026.

From official California registry records, updated weekly. Most Mill Valley businesses are in Marin County. Look up a California business by name.

Businesses on record
5,007
Formed in the last 12 months
371
Formed in September
1
With a registered agent
98%
4,888 records

New Mill Valley businesses per month

0250500Oct 2024: 1Oct 24Nov 2024: 1Dec 2024: 2Jan 2025: 4212025Feb 2025: 1Mar 2025: 5Apr 2025: 4May 2025: 3Jun 2025: 2Jul 2025: 4Aug 2025: 1Sep 2025: 7Oct 2025: 2Nov 2025: 4Dec 2025: 2Jan 2026: 3292026Feb 2026: 1Mar 2026: 4Apr 2026: 6May 2026: 4Jun 2026: 3Jul 2026: 3Aug 2026: 12Sep 2026: 1

Businesses on record by formation month, through September 2026. Monthly California new-business reports · Get the list of 1 new businesses formed in September 2026

Entity types

  • LLCs3,057 · 61%
  • Corporations1,126 · 22%
  • Other425 · 8%
  • Limited partnerships394 · 8%
  • Nonprofits3 · 0%
  • LLPs2 · 0%

Top ZIP codes

Newest business names registered in Mill Valley

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BusinessCityTypeFormed
Name hiddenMill ValleyCorporationSep 2026
Name hiddenMill ValleyLLCAug 2026
Name hiddenMill ValleyLLCAug 2026
Name hiddenMill ValleyLLCAug 2026
Name hiddenMill ValleyLLCAug 2026
Name hiddenMill ValleyLLCAug 2026
Name hiddenMill ValleyLLCAug 2026
Name hiddenMill ValleyCorporationAug 2026
Name hiddenMill ValleyLLCAug 2026
Name hiddenMill ValleyLLCAug 2026
Name hiddenMill ValleyLLCAug 2026
Name hiddenMill ValleyLLCAug 2026
Name hiddenMill ValleyLLCAug 2026
Name hiddenMill ValleyLLCJul 2026
Name hiddenMill ValleyLLCJul 2026
Name hiddenMill ValleyLLCJul 2026
Name hiddenMill ValleyLLCJun 2026
Name hiddenMill ValleyCorporationJun 2026
Name hiddenMill ValleyCorporationJun 2026
Name hiddenMill ValleyLLCMay 2026
Name hiddenMill ValleyCorporationMay 2026
Name hiddenMill ValleyLLCMay 2026
Name hiddenMill ValleyLLCMay 2026
Name hiddenMill ValleyCorporationApr 2026
Name hiddenMill ValleyLLCApr 2026

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Common questions about Mill Valley businesses

How many businesses are registered in Mill Valley, California?

ListRiver has 5,007 active registered businesses in Mill Valley, California on record as of October 12, 2026, from official California business registry data. Dissolved and defunct businesses are not counted.

How many new businesses were formed in Mill Valley, California in September 2026?

1 businesses on record in Mill Valley, California were formed in September 2026.

How many new businesses opened in Mill Valley, California in the last 12 months?

371 businesses on record in Mill Valley, California were formed in the 12 months through September 2026.

What is the most common type of business in Mill Valley, California?

LLCs are the most common: 3,057 of 5,007 businesses on record (61%), followed by Corporations with 1,126 (22%).

Where does this data come from?

From California'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 Mill Valley, California?

Use ListRiver's list builder to filter Mill Valley, California 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 California business registry records on file with ListRiver, current as of October 12, 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.