As of October 18, 2026, ListRiver's records show 298,893 active registered businesses in San Diego County, California, the 3rd most among California counties. 55% are LLCs. 89 were formed in September 2026. That is 8% of all California businesses on record.
How many businesses are registered in San Diego County, California?
ListRiver has 298,893 active registered businesses in San Diego County, California on record as of October 18, 2026, from official California business registry data. Dissolved and defunct businesses are not counted.
How many new businesses were formed in San Diego County, California in September 2026?
89 businesses on record in San Diego County, California were formed in September 2026.
How many new businesses opened in San Diego County, California in the last 12 months?
23,265 businesses on record in San Diego County, California were formed in the 12 months through September 2026.
What is the most common type of business in San Diego County, California?
LLCs are the most common: 164,512 of 298,893 businesses on record (55%), followed by Corporations with 90,440 (30%).
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 San Diego County, California?
Use ListRiver's list builder to filter San Diego County, 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.
Free to use on any site, and it updates itself every month. Copy this code and paste it into your page. Preview the chart.
Counts come from official California business registry records on file with ListRiver, current as of October 18, 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.