Westamerica Bank
San Rafael, California, Marin County
$5.8B in total assets, the 264th largest of 4,309 US banks and 22nd of 120 headquartered in California.
- FDIC certificate
- 3430
- Established
- 1884
- Owned by
- Westamerica Bcorp
- Primary regulator
- FED
- Website
- www.westamerica.com
At a glance
Compared with 51 banks headquartered in California with $1 billion to $10 billion in assets, as of June 30, 2026.
| Measure | This bank | Percentile | Peer range, middle 90% | Peer median |
|---|---|---|---|---|
| Total assets | $5.8B | 78% | $2.7B | |
| Loans | $669M | 10% | $2.1B | |
| Deposits | $4.8B | 76% | $2.3B | |
| Return on assets | 1.87% | 90% | 1.21% | |
| Net interest margin | 3.86% | 55% | 3.80% | |
| Efficiency ratio | 42.5% | 18% | 54.4% | |
| Equity to assets | 10.49% | 29% | 11.37% | |
| Loans to deposits | 14% | 4% | 90% |
Growth
Total assets grew -4.1% a year over the last 5 years and 1.2% a year over 10 years, without acquisitions.
Acquisitions
| Closed | Acquired bank | Assets at acquisition |
|---|---|---|
| Aug 2010 | Sonoma Valley Bank Sonoma, CA | $337M |
| Feb 2009 | County Bank Merced, CA | $1.7B |
| Mar 2005 | National Bank of the Redwoods Santa Rosa, CA | $506M |
| Jun 2002 | Kerman State Bank Kerman, CA | $100M |
| Sep 2000 | First Counties Bank Clearlake, CA | $91M |
| Aug 2000 | Bank of Lake County Lakeport, CA, an affiliate under the same holding company | $91M |
| Jun 1997 | ValliWide Bank Fresno, CA | $1.2B |
| Apr 1996 | Napa Valley Bank Napa, CA, an affiliate under the same holding company | $275M |
| Sep 1995 | Novato National Bank Novato, CA | $88M |
| Jun 1995 | CapitolBank Sacramento Sacramento, CA | $127M |
| Feb 1995 | Pacific Valley National Bank Modesto, CA | $178M |
| May 1993 | Suisun Valley Bank Fairfield, CA | $70M |
| Feb 1992 | John Muir National Bank Martinez, CA | $57M |
| Oct 1985 | (unknown, CERT 90549) , CA | $1M |
| Jul 1983 | Bank of Sonoma County Santa Rosa, CA | n/a |
| Jul 1983 | Vaca Valley Bank Vacaville, CA | n/a |
| Jul 1983 | Bank of Marin San Rafael, CA | n/a |
| Jul 1983 | Gold Country Bank Grass Valley, CA | n/a |
| Jul 1983 | Bank of Lake County Lakeport, CA | n/a |
Where they operate
75 branches in 19 counties.
Largest markets by deposits
| County | Deposits | Market share | Rank |
|---|---|---|---|
| Marin County, CA | $845M | 5.2% | 6 of 18 |
| Sonoma County, CA | $651M | 3.3% | 8 of 14 |
| Merced County, CA | $595M | 17.7% | 2 of 10 |
| Fresno County, CA | $554M | 2.8% | 10 of 22 |
| Stanislaus County, CA | $311M | 2.7% | 11 of 17 |
| Napa County, CA | $273M | 6.3% | 7 of 13 |
Deposits by branch from the FDIC Summary of Deposits, June 2026. Rank among all banks with branches in that county.
Branch history since 2016
Net loss of 13 branches since 2016 (88 to 75, −14.8%). 1 opened, 0 acquired, 14 closed or sold.
| Period | What happened | Opened or acquired | Closed or sold | Net change | Branches at end |
|---|---|---|---|---|---|
| Start of 2016 | Starting point | 88 | |||
| 2016 | Closed 3 in California | 0 | 3 | −3 | 85 |
| 2017 | Closed 3 in California | 0 | 3 | −3 | 82 |
| 2018 | Closed Livermore and Selma | 0 | 2 | −2 | 80 |
| 2020 | Opened TulareClosed San Rafael | 1 | 1 | 0 | 80 |
| 2021 | Closed Riverbank and Tulare | 0 | 2 | −2 | 78 |
| 2022 | Closed Petaluma | 0 | 1 | −1 | 77 |
| 2024 | Closed Taft | 0 | 1 | −1 | 76 |
| 2026 through Q2 | Closed San Francisco | 0 | 1 | −1 | 75 |
Balance sheet and earnings
Loans by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Commercial real estate | 66% | 47% | |
| Consumer | 14% | 2% | |
| Business (C&I) | 11% | 15% | |
| 1-4 family residential | 2% | 15% | |
| Farmland | 2% | 2% | |
| Multifamily | 1% | 13% | |
| Construction and land | 0% | 3% | |
| Other | 4% | 2% |
Deposits by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Other interest-bearing | 54% | 48% | |
| Noninterest-bearing | 45% | 28% | |
| Time deposits | 1% | 23% |
Brokered deposits are 0.0% of deposits (peers 4.6%).
Return on assets
Trailing four quarters, with the peer median.
Credit and capital
| This bank | Peer median | |
|---|---|---|
| Noncurrent loans | 0.12% | 0.48% |
| Net charge-offs, annualized | 0.14% | 0.05% |
| Reserves to loans | 1.61% | 1.25% |
| Leverage ratio | 10.27% | 11.65% |
Noncurrent loans exclude government-guaranteed portions.
Related banks
Similar size in California
Largest competitors in Marin County, CA
Figures as of June 30, 2026 from the bank's Call Report, FDIC structure and branch data, and the Federal Reserve. Short link: bankingstats.com/westamerica