June 30, 2026

California has 21,585 psychologists. Five counties have most of them.

California is not short of psychologists the way people assume. The state has 21,585 active clinical psychologists on the federal registry. The problem is where they sit. Sixty-one percent of them practice in just five counties, and those five counties are home to 48 percent of Californians. The rest of the state splits what is left.

61%

Of California's clinical psychologists practice in just 5 counties

21,585

Active clinical psychologists statewide

3

Counties with zero psychologists inside county lines

Quick answer: how concentrated is California's psychologist workforce?

Five counties (Los Angeles, San Diego, Orange, Alameda, and San Francisco) hold 61 percent of every clinical psychologist in California while housing 48 percent of its people. The statewide average is roughly 55 psychologists per 100,000 residents. In the worst-staffed large county, Stanislaus, it is 12.8, less than a quarter of the state rate. Three counties have none at all.

Lean Medical mapped the whole registered psychologist workforce, county by county, off the federal NPPES provider file. We did it because "California needs more therapists" is the wrong diagnosis. The state already trained them. It just parked them on the coast.

The map is wildly lopsided

San Francisco has about 164 psychologists for every 100,000 residents. Marin has 158. Then you cross into the Central Valley. Stanislaus has 12.8. San Joaquin has 16.3. A San Franciscan and a Stanislaus resident live in the same state, under the same insurance-parity laws, and one of them has more than ten times the local psychologist supply of the other.

Three counties (Alpine, Glenn, and Sierra) do not have a single clinical psychologist with a practice address inside county lines. They are small, but the same gradient shows up in counties with millions of people. Riverside County has 2.4 million residents and 424 psychologists, about 17.5 per 100,000, roughly a third of the per-capita supply in coastal Los Angeles.

The shortage is in the Central Valley and the Inland Empire

The thinnest-staffed large counties form a clear belt: Stanislaus (Modesto), San Joaquin (Stockton), Fresno, and Kern (Bakersfield) through the Central Valley, and Riverside and San Bernardino across the Inland Empire. The full 58-county table is below, sorted from best-served to worst.

Psychologists by county

Download CSV
CountyPopulationPsychologistsPer 100k
San Francisco873,9651,431163.7
Marin262,321414157.8
Napa138,019192139.1
San Luis Obispo282,424298105.5
Alameda1,682,3531,54792.0
Del Norte27,7432382.9
San Mateo764,44257975.7
San Diego3,298,6342,48275.2
Sonoma488,86335071.6
Amador40,4742766.7
Santa Clara1,936,2591,24964.5
Santa Barbara448,22927761.8
Los Angeles10,014,0096,08260.7
Mono13,195860.6
Contra Costa1,165,92764655.4
Santa Cruz270,86114553.5
Orange3,186,9891,63451.3
Nevada102,2414947.9
Solano453,49121547.4
Yolo216,40310247.1
Ventura843,84339646.9
Sacramento1,585,05570344.4
Kings152,4866743.9
Tuolumne55,8102443.0
Mendocino91,6013740.4
Monterey439,03516437.4
Fresno1,008,65437136.8
Lassen32,7301236.7
Placer404,73914836.6
Madera156,2555434.6
Modoc8,700334.5
Humboldt136,4634130.0
San Bernardino2,181,65464329.5
Shasta182,1555329.1
Inyo19,016526.3
El Dorado191,1855026.2
Siskiyou44,0761022.7
Kern909,23520022.0
Butte211,6324420.8
Calaveras45,292919.9
Trinity16,112318.6
Riverside2,418,18542417.5
Tulare473,1178217.3
Yuba81,5751417.2
San Joaquin779,23312716.3
Plumas19,790315.2
Lake68,163913.2
Stanislaus552,8787112.8
Sutter99,6331111.0
San Benito64,209710.9
Imperial179,702179.5
Merced281,202269.2
Tehama65,82957.6
Mariposa17,13115.8
Colusa21,83914.6
Alpine1,20400.0
Glenn28,91700.0
Sierra3,23600.0

Why "train more psychologists" misses the point

The reflex answer to a workforce gap is to produce more clinicians. It would not fix this. New psychologists overwhelmingly set up where psychologists already are, in the Bay Area and the Los Angeles basin, because that is where the training programs, the supervisors, and the cash-pay clientele sit. Graduate more of them and most of the additional supply lands in the counties that already have the most. California's problem is distribution at least as much as headcount, and distribution is not something a new cohort of graduates solves on its own.

There is one structural lever that does change the math. California lets any state-licensed clinician treat a patient anywhere in California by secure video. For a family in Stanislaus or Merced, that turns the available pool from a few dozen local psychologists into the entire state's 21,585. The catch is the part that looks easy and is not: finding a clinician who is both in-network with your insurance and has an open slot. That is a paneling and operations problem, and it is the reason a registry of 21,585 psychologists still leaves most of the state under-served in practice.

Method

Provider counts come from the federal NPPES registry, filtered to active California records in the clinical psychology taxonomy codes. We removed duplicate NPIs and mapped each clinician to a county by practice ZIP code, validated against a ZIP-to-county crosswalk. Per-capita rates use 2020 Census county populations. A registry address tells you a clinician filed paperwork at that location. It does not tell you whether they currently see patients, accept insurance, or have room for a new one. So read these counts as the ceiling on access, not the floor. The real supply a patient can reach is lower.

This is the psychologist companion to our statewide analysis of the California child psychiatrist shortage, which found 17 counties with no child and adolescent psychiatrist at all.

Key Takeaways

Key takeaways

  • California has 21,585 clinical psychologists, but 61 percent of them are in five counties that hold 48 percent of the population.
  • The statewide average is about 55 per 100,000. Stanislaus, the worst-staffed large county, has 12.8. San Francisco has more than ten times that rate.
  • Three counties (Alpine, Glenn, Sierra) have zero registered psychologists.
  • The fix is distribution, not just headcount: statewide telehealth plus getting clinicians paneled and in-network in the counties that have been left short.

Explore more

The child psychiatrist shortage

Our statewide companion analysis: 17 California counties have zero child and adolescent psychiatrists.

Stanislaus County, up close

The worst-staffed large county for clinical psychology in California, by the numbers.

Find a clinician

Browse California-licensed clinicians available by telehealth statewide and in person.