Western Alliance Bank holds $71.4B in deposits across 14 counties in 11 ranked markets and 6 states. Its deposit footprint is highly concentrated: the top three counties (Maricopa County, San Diego County, Santa Clara County) hold 83% of its deposits, and Arizona accounts for 64% of the total. It ranks among the three largest institutions in 3 of the 14 counties where it operates.
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Data as of June 30, 2025 (FDIC Summary of Deposits)
| County | Deposits | County’s % of Bank’s Deposits | Bank’s % of County Deposits | Branches | |
|---|---|---|---|---|---|
| 1. | Maricopa County, AZ | $45.1B | 63.1% | 25.4% | 6 |
| 2. | San Diego County, CA | $7.2B | 10.1% | 5.6% | 6 |
| 3. | Santa Clara County, CA | $6.9B | 9.7% | 4.4% | 1 |
| 4. | Clark County, NV | $5.6B | 7.9% | 5.6% | 10 |
| 5. | Alameda County, CA | $1.5B | 2.2% | 2.3% | 1 |
| 6. | Los Angeles County, CA | $1.4B | 1.9% | 0.3% | 2 |
| 7. | Cook County, IL | $1.2B | 1.6% | 0.3% | 1 |
| 8. | Washoe County, NV | $888M | 1.2% | 6.0% | 3 |
| 9. | New York County, NY | $431M | 0.6% | 0.0% | 1 |
| 10. | Pima County, AZ | $409M | 0.6% | 2.2% | 2 |
| 11. | Coconino County, AZ | $385M | 0.5% | 16.3% | 1 |
| 12. | Denver County, CO | $173M | 0.2% | 0.3% | 1 |
| 13. | Churchill County, NV | $131M | 0.2% | 25.9% | 1 |
| 14. | Carson (City) County, NV | $66M | 0.1% | 4.4% | 1 |
Deposits are as reported to the FDIC at branch level, June 30, 2025, and are nominal. “County’s % of Bank’s Deposits” is this county’s share of the institution’s total deposits; “Bank’s % of County Deposits” is this institution’s deposits as a percent of all deposits booked in that county. Counties within a Combined or Metropolitan Statistical Area link to their full profile; other counties are shown for completeness.
All 293 markets and the 1,533 counties within a CSA or MSA are covered in the Market Intelligence resource. See the methodology for how each figure is built and when to expect updates.