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Westamerica Bank Locations & Branches San Rafael, California
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Westamerica Bank operates 75 branches from its headquarters in San Rafael, CA, .
Westamerica Bank branch network
All 75 branches are in CALIFORNIA, across 62 cities. Fresno, CA has the most of its branches, 5. Its largest office by deposits is its main office in San Rafael, CA, with $210.8M (4.4% of its branch deposits). On June 30, 2025 it had 76 branches, 1 more than in 2026.
Westamerica Bank at a glance
Its CET1 capital ratio was 16.23% at Q2 2026, comfortably above the 7% level required once the capital conservation buffer is included.
- Total assets, Q2 2026
- $5.77B
- CET1 ratio, Q2 2026
- 16.23%
- Deposit insurance
- FDIC
- Regulator
- Federal Reserve
- Latest call report
- Q2 2026, FFIEC 041
- Established
- 1884
Full financial profile · Is Westamerica Bank safe? · Westamerica Bank call report · Routing number
Deposit market share
Share of all FDIC-insured deposits held in each area, from the June 30, 2026 Summary of Deposits. Rank 1 is the largest holder. Shares are by bank charter, not by holding company.
| Area | Rank | Deposit share | Deposits |
|---|---|---|---|
| City: San Rafael, CA (3 branches) | 6 of 15 | 7.3% | $335.1M |
| State: CA (75 branches) | 37 of 164 | 0.3% | $4.78B |
Ranked by total assets among banks headquartered in the state: Largest banks in California.
Share by county and metro area
Westamerica Bank's share of FDIC-insured deposits in the counties and metro areas where it has branches, from the June 30, 2026 Summary of Deposits. Up to the ten largest of each are shown, by the bank's deposits. Rank 1 is the largest holder. Banks only: credit unions are not in the Summary of Deposits.
Counties
| County | Rank | Deposit share | Deposits | County total |
|---|---|---|---|---|
| Marin, CA (10 branches) | 6 of 18 | 5.3% | $844.9M | $16.06B |
| Sonoma, CA (9 branches) | 8 of 14 | 3.3% | $650.8M | $19.60B |
| Merced, CA (7 branches) | 2 of 10 | 17.7% | $595.3M | $3.37B |
| Fresno, CA (11 branches) | 10 of 22 | 2.9% | $553.6M | $19.07B |
| Stanislaus, CA (4 branches) | 11 of 17 | 2.7% | $311.4M | $11.41B |
| Napa, CA (6 branches) | 7 of 13 | 6.3% | $272.7M | $4.34B |
| Contra Costa, CA (3 branches) | 17 of 30 | 0.4% | $206.2M | $50.49B |
| Solano, CA (4 branches) | 7 of 11 | 3.0% | $198.8M | $6.70B |
| Sacramento, CA (3 branches) | 20 of 30 | 0.3% | $198.0M | $72.87B |
| Lake, CA (4 branches) | 1 of 7 | 23.7% | $195.8M | $826.9M |
Metro areas
| Metro area | Rank | Deposit share | Deposits | Metro total |
|---|---|---|---|---|
| San Francisco-Oakland-Berkeley, CA (14 branches) | 25 of 69 | 0.2% | $1.10B | $512.65B |
| Santa Rosa-Petaluma, CA (9 branches) | 8 of 14 | 3.3% | $650.8M | $19.60B |
| Merced, CA (7 branches) | 2 of 10 | 17.7% | $595.3M | $3.37B |
| Fresno, CA (11 branches) | 10 of 22 | 2.9% | $553.6M | $19.07B |
| Modesto, CA (4 branches) | 11 of 17 | 2.7% | $311.4M | $11.41B |
| Napa, CA (6 branches) | 7 of 13 | 6.3% | $272.7M | $4.34B |
| Vallejo, CA (4 branches) | 7 of 11 | 3.0% | $198.8M | $6.70B |
| Sacramento-Roseville-Folsom, CA (3 branches) | 25 of 37 | 0.2% | $198.0M | $96.40B |
| Clearlake, CA (4 branches) | 1 of 7 | 23.7% | $195.8M | $826.9M |
| Bakersfield, CA (3 branches) | 11 of 15 | 1.5% | $164.9M | $11.28B |
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Westamerica Bank (main office) | San Rafael, CA | 94901 | $210.8M |
| Merced Downtown Branch | Merced, CA | 95340 | $183.5M |
| Novato Branch | Novato, CA | 94945 | $177.4M |
| Sonoma Branch | Sonoma, CA | 95476 | $146.2M |
| Turlock Geer Road Branch | Turlock, CA | 95382 | $144.7M |
| Washington Square Branch | Petaluma, CA | 94954 | $107.5M |
| Walnut Creek Branch | Walnut Creek, CA | 94596 | $105.1M |
| Kingsburg Branch | Kingsburg, CA | 93631 | $95.8M |
| North Napa Branch | Napa, CA | 94558 | $93.5M |
| Sausalito Branch | Sausalito, CA | 94965 | $92.7M |
| Sebastopol Branch | Sebastopol, CA | 95472 | $92.3M |
| Livingston Branch | Livingston, CA | 95334 | $89.7M |
| Mchenry Branch | Modesto, CA | 95350 | $89.4M |
| Santa Rosa Branch | Santa Rosa, CA | 95404 | $87.7M |
| Capitol Branch | Sacramento, CA | 95814 | $86.8M |
| Mariposa Branch | Mariposa, CA | 95338 | $86.4M |
| Dos Palos Branch | Dos Palos, CA | 93620 | $81.2M |
| Shafter Branch | Shafter, CA | 93263 | $80.5M |
| Muir Station Branch | Martinez, CA | 94553 | $77.6M |
| Kerman Branch | Kerman, CA | 93630 | $72.6M |
| Fairfield Branch | Fairfield, CA | 94534 | $71.2M |
| Ignacio Branch | Novato, CA | 94949 | $68.9M |
| Lakeport Branch | Lakeport, CA | 95453 | $68.2M |
| Madera Branch | Madera, CA | 93637 | $68.2M |
| Merced Olive Branch | Merced, CA | 95348 | $66.2M |
| East Shaw Branch | Fresno, CA | 93710 | $65.9M |
| Grass Valley Branch | Grass Valley, CA | 95945 | $65.1M |
| Point West Branch | Sacramento, CA | 95815 | $64.7M |
| Northgate Branch | San Rafael, CA | 94903 | $63.6M |
| 1st and Herndon Branch | Fresno, CA | 93720 | $63.5M |
| Ukiah Branch | Ukiah, CA | 95482 | $62.2M |
| Visalia Downtown Branch | Visalia, CA | 93291 | $62.0M |
| Los Banos Branch | Los Banos, CA | 93635 | $62.0M |
| Francisco-Irene Branch | San Rafael, CA | 94901 | $60.8M |
| Rohnert Park Branch | Rohnert Park, CA | 94928 | $58.6M |
| Hilmar Branch | Hilmar, CA | 95324 | $57.3M |
| San Anselmo Branch | San Anselmo, CA | 94960 | $56.2M |
| Gualala Branch | Gualala, CA | 95445 | $56.1M |
| Atwater Branch | Atwater, CA | 95301 | $55.4M |
| Firebaugh Branch | Firebaugh, CA | 93622 | $54.8M |
| Healdsburg Branch | Healdsburg, CA | 95448 | $53.7M |
| Ceres Branch | Ceres, CA | 95307 | $53.2M |
| Bakersfield Branch | Bakersfield, CA | 93301 | $52.0M |
| Pleasanton Branch | Pleasanton, CA | 94588 | $51.0M |
| Sanger Branch | Sanger, CA | 93657 | $51.0M |
| Guerneville Branch | Guerneville, CA | 95446 | $50.9M |
| Vallejo Branch | Vallejo, CA | 94590 | $49.2M |
| Clovis Branch | Clovis, CA | 93612 | $48.7M |
| Clearlake Branch | Clearlake, CA | 95422 | $47.2M |
| Rancho Cordova Branch | Rancho Cordova, CA | 95742 | $46.5M |
| Benicia Branch | Benicia, CA | 94510 | $45.7M |
| Middletown Branch | Middletown, CA | 95461 | $43.5M |
| Cross Roads Branch | Santa Rosa, CA | 95403 | $43.4M |
| South Napa Branch | Napa, CA | 94559 | $41.8M |
| Strawberry Branch | Mill Valley, CA | 94941 | $41.4M |
| Sonora Branch | Sonora, CA | 95370 | $40.7M |
| Mill Valley Branch | Mill Valley, CA | 94941 | $39.6M |
| Calistoga Branch | Calistoga, CA | 94515 | $39.0M |
| Kelseyville Branch | Kelseyville, CA | 95451 | $36.9M |
| Tulare Branch | Tulare, CA | 93274 | $35.2M |
| Larkspur Branch | Larkspur, CA | 94939 | $33.6M |
| Hanford Branch | Hanford, CA | 93230 | $33.3M |
| American Canyon Branch | American Canyon, CA | 94503 | $33.3M |
| St. Helena Branch | St. Helena, CA | 94574 | $32.8M |
| Peabody Road Branch | Vacaville, CA | 95687 | $32.7M |
| Lake Isabella Branch | Lake Isabella, CA | 93240 | $32.4M |
| Yountville Branch | Yountville, CA | 94599 | $32.3M |
| Fresno West Shaw Branch | Fresno, CA | 93711 | $31.6M |
| Easton Branch | Fresno, CA | 93706 | $24.1M |
| Kansas Branch | Modesto, CA | 95351 | $24.1M |
| Concord Branch | Concord, CA | 94520 | $23.5M |
| Wildwood Branch | Penn Valley, CA | 95946 | $23.4M |
| Fresno Downtown Branch | Fresno, CA | 93721 | $23.3M |
| Huron Branch | Huron, CA | 93234 | $22.4M |
| Glen Ellen Branch | Glen Ellen, CA | 95442 | $10.6M |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 3430) · FFIEC NIC profile (RSSD 697763)