Branch Network
Summit State Bank Locations & Branches Santa Rosa, California
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Summit State Bank operates 4 branches from its headquarters in Santa Rosa, CA, .
Summit State Bank branch network
All 4 branches are in CALIFORNIA, across 4 cities. Its largest office by deposits is its main office in Santa Rosa, CA, with $539.9M (63.8% of its branch deposits). On June 30, 2025 it had 5 branches, 1 more than in 2026.
Summit State Bank at a glance
Its CET1 capital ratio was 13.10% at Q2 2026, comfortably above the 7% level required once the capital conservation buffer is included.
- Total assets, Q2 2026
- $959.8M
- CET1 ratio, Q2 2026
- 13.10%
- Deposit insurance
- FDIC
- Regulator
- FDIC
- Established
- 1982
Full financial profile · Is Summit State Bank safe? · 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: Santa Rosa, CA (1 branch) | 7 of 14 | 4.4% | $539.9M |
| State: CA (4 branches) | 87 of 164 | <0.1% | $846.1M |
Ranked by total assets among banks headquartered in the state: Largest banks in California.
Share by county and metro area
Summit State 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 |
|---|---|---|---|---|
| Sonoma, CA (4 branches) | 7 of 14 | 4.3% | $846.1M | $19.60B |
Metro areas
| Metro area | Rank | Deposit share | Deposits | Metro total |
|---|---|---|---|---|
| Santa Rosa-Petaluma, CA (4 branches) | 7 of 14 | 4.3% | $846.1M | $19.60B |
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Summit State Bank (main office) | Santa Rosa, CA | 95403 | $539.9M |
| Healdsburg Branch | Healdsburg, CA | 95448 | $117.2M |
| Petaluma Branch | Petaluma, CA | 94952 | $106.6M |
| Rohnert Park Branch | Rohnert Park, CA | 94928 | $82.5M |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 32203) · FFIEC NIC profile (RSSD 561574)