FDIC-insured bank
1st Financial Bank USA — Dakota Dunes, SD
Bank headquartered in Dakota Dunes, South Dakota.
Source: FDIC BankFind Suite, data as of June 30, 2026, fetched September 5, 2026
Headquarters and contact
| Address | 331 Dakota Dunes Blvd Dakota Dunes, SD 57049 |
| County | Union |
| Metro area | Sioux City, IA-NE-SD |
| Website | www.1fbusa.com |
| Phone | not published in FDIC data, see the bank's website |
FDIC record
| FDIC Certificate | 1673 |
| Federal Reserve RSSD ID | 526452 |
| Status | Active |
| Charter class | NM (STATE) |
| Domestic offices | 2 |
| Financials as of | June 30, 2026 |
How to find your 1st Financial Bank USA routing number
FDIC does not publish ABA routing numbers, and many banks use different routing numbers by state or by account type. The reliable places to find yours: the bottom left of a check from this bank, the "account details" screen in its online banking, or its official website at www.1fbusa.com.
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Offices nearest to headquarters
| 1St Financial Bank Usa main office Dakota Dunes, SD |
331 Dakota Dunes Blvd, 57049 |
| Dupree Branch Dupree, SD |
424 Main Street, 57623 |
Where 1st Financial Bank USA has offices
Cities with the most 1st Financial Bank USA offices
Other banks headquartered in Dakota Dunes
| Security National Bank of South Dakota | $251.46 million |
Largest banks headquartered elsewhere in South Dakota
| Citibank, National Association Sioux Falls | $1.98 trillion |
| Wells Fargo Bank, National Association Sioux Falls | $1.91 trillion |
| The Bancorp Bank, National Association Sioux Falls | $9.21 billion |
| Pathward, National Association Sioux Falls | $7.31 billion |
| Dacotah Bank Aberdeen | $4.92 billion |
| First Bank & Trust Brookings | $4.78 billion |
| First PREMIER Bank Sioux Falls | $3.64 billion |
| First Dakota National Bank Yankton | $3.39 billion |
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