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Sell or Buy a Business in California

California is home to about 196,969 establishments in the 37 owner-operated industries WETYR acquires, by U.S. Census Bureau count. That is 50.0 for every 10,000 residents, close to the national rate of 50.1 and 26th among the 50 states.

By Mark Gabrielli, WETYR Operator. Data reviewed October 7, 2026.

The three largest of those industries in California are dental practices (22,639 establishments), accounting, tax prep and bookkeeping firms (18,425), and insurance agencies and brokerages (14,189). WETYR buys qualifying California businesses directly and confidentially, and, with an owner's OK, introduces California owners to registry buyers whose buy box fits. Owners and buyers then deal directly with their own advisors.

39,356,104
Residents (1st of 50)
$91,905
Median household income (5th)
196,969
Tracked establishments (1st)
50.0
Per 10,000 residents (26th)

The largest owner-operated industries in California

California ranks 1st in the country for dental practices, with 22,639 establishments, or 16.8% of the U.S. total, against 11.9% of the U.S. population. Below are the fifteen largest categories in California.

Largest owner-operated industries in California. Source: U.S. Census Bureau, County Business Patterns. Index = California establishments per resident vs the U.S. average (1.00).
IndustryEstablishmentsPer 100k residentsIndex vs U.S.U.S. rank
Dental practices22,63957.51.411st
Accounting, tax prep and bookkeeping firms18,42546.81.151st
Insurance agencies and brokerages14,18936.10.891st
Plumbing and HVAC contractors11,33128.80.871st
Electrical contractors9,90925.21.031st
General auto repair shops9,70324.70.981st
Local general freight trucking9,42023.91.791st
Landscaping and tree services9,31623.70.672nd
Childcare centers9,29523.60.991st
IT services and computer systems design7,80719.81.181st
Commercial cleaning and janitorial services6,71617.10.851st
Gas stations with convenience stores6,70217.00.592nd
Fitness centers and gyms5,22313.31.111st
Home health care agencies5,09713.01.131st
Physical therapy clinics5,04712.80.861st

Where California is over and under the national average

Per resident, California runs heaviest in security guard and patrol companies (2,070 establishments, index 1.79, 1st nationally by count); local general freight trucking (9,420 establishments, index 1.79, 1st nationally by count); durable goods wholesalers and distributors (1,624 establishments, index 1.57, 1st nationally by count). That top index of 1.79 means 79% more security guard and patrol companies per California resident than the U.S. average. Concentration like that usually points to an established local operator base.

At the other end, California is thinnest in funeral homes (index 0.48) and site preparation and excavation contractors (index 0.57). Thin categories cut both ways: fewer local competitors for an operator, but fewer comparable transactions when a buyer prices a deal.

California counties with the most owner-operated businesses

California counties with the most establishments in WETYR's tracked industries. Sources: Census County Business Patterns; ACS 5-year estimates.
County or areaEstablishmentsMedian household incomeMedian home value
Los Angeles County51,221$83,411$732,200
Orange County20,139$109,361$862,900
San Diego County17,523$96,974$725,200
Riverside County10,339$84,505$462,900
Santa Clara County10,329$153,792$1,316,800
San Bernardino County9,329$77,423$438,000
Alameda County8,051$122,488$999,200
Sacramento County7,338$84,010$465,900
Contra Costa County5,788$120,020$787,300
Ventura County4,862$102,141$719,100

Los Angeles County, Orange County, San Diego County hold 45% of the 196,969 tracked establishments across 57 California counties or areas. Median household income runs from $47,317 in Trinity County to $153,792 in Santa Clara County (3.3x), which changes what a buyer underwrites.

California metro markets

Los Angeles, San Diego, San Jose, San Francisco, Fresno, Sacramento, Long Beach, Oakland, Bakersfield, Anaheim, Riverside, Stockton, San Bernardino and Pasadena are the 14 California metros with dedicated WETYR city pages, linked below for dental practices and accounting, tax prep and bookkeeping firms.

Working with WETYR in California

WETYR buys California businesses directly, with no listing and no broker commission, and, with your OK, introduces California owners to registry buyers who fit.

Get a confidential valuation

Tell us a little about your business in California. We reply with an indicative value range and whether we are a direct fit, within one business day. No obligation, no listing, nothing public.

California business sale FAQ

How many small businesses are in the industries WETYR buys in California?

U.S. Census County Business Patterns counts about 196,969 establishments in California across the 37 owner-operated industries WETYR tracks, 1st among the 50 states. With roughly 39,356,104 residents, that works out to 50.0 establishments per 10,000 people versus 50.1 nationally. California holds 11.90% of the U.S. total in these industries and 11.91% of the population.

Which industries are most common in California?

By establishment count the largest are dental practices (22,639), accounting, tax prep and bookkeeping firms (18,425), and insurance agencies and brokerages (14,189). Dental practices alone is 11.5% of the state's tracked total. Relative to population, California is most concentrated in security guard and patrol companies, local general freight trucking and durable goods wholesalers and distributors.

Does California tax the gain when I sell my business?

Yes. California taxes personal income, so the gain on a sale is generally subject to state tax in addition to federal tax. How much depends on structure: asset versus stock sale, how the purchase price is allocated, and whether part is paid over time. Model the after-tax number with a California CPA before you accept a headline price.

Where in California are most of these businesses located?

Los Angeles County leads with about 51,221 tracked establishments, followed by Orange County (20,139) and San Diego County (17,523). Together the top three hold 45% of the state total. Median household income in Los Angeles County is $83,411 and the median home value is $732,200. The smallest tracked area is Sierra County with 6.

Sell by industry in California

Sources

Census County Business Patterns (employer establishments, NAICS 2017); American Community Survey 5-year. Ranks and indexes: WETYR calculations, 50 states.