FDIC-insured bank
Frontier Bank — Sioux Falls, SD
Bank headquartered in Sioux Falls, South Dakota, part of ROCK RIVERS BCORP.
Source: FDIC BankFind Suite, data as of June 30, 2026, fetched September 5, 2026
Headquarters and contact
| Address | 101 S Phillips Ave Sioux Falls, SD 57104 |
| County | Minnehaha |
| Metro area | Sioux Falls, SD |
| Website | www.frontierbank.com |
| Phone | not published in FDIC data, see the bank's website |
FDIC record
| FDIC Certificate | 33922 |
| Federal Reserve RSSD ID | 2218443 |
| Status | Active |
| Charter class | SB (OCC) |
| Holding company | ROCK RIVERS BCORP |
| Domestic offices | 5 |
| Financials as of | June 30, 2026 |
How to find your Frontier Bank 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.frontierbank.com.
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Offices nearest to headquarters
| Frontier Bank main office Sioux Falls, SD |
101 S Phillips Ave, 57104 |
| Sioux Falls Branch Sioux Falls, SD |
3501 W 57th St, 57108 |
| Rock Rapids Branch Rock Rapids, IA |
301 1st Ave, 51246 |
| George Branch George, IA |
210 E Dakota Ave, 51237 |
| Little Rock Branch Little Rock, IA |
323 Main St, 51243 |
Where Frontier Bank has offices
Cities with the most Frontier Bank offices
Other banks headquartered in Sioux Falls
| Citibank, National Association | $1.98 trillion |
| Wells Fargo Bank, National Association | $1.91 trillion |
| The Bancorp Bank, National Association | $9.21 billion |
| Pathward, National Association | $7.31 billion |
| First PREMIER Bank | $3.64 billion |
| Sunrise Banks, National Association | $2.78 billion |
| American Bank & Trust | $2.25 billion |
| The First National Bank in Sioux Falls | $2.12 billion |
Largest banks headquartered elsewhere in South Dakota
| Dacotah Bank Aberdeen | $4.92 billion |
| First Bank & Trust Brookings | $4.78 billion |
| First Dakota National Bank Yankton | $3.39 billion |
| First National Bank Fort Pierre | $2.03 billion |
| BankWest, Inc. Pierre | $1.93 billion |
| First Savings Bank Beresford | $1.59 billion |
| CorTrust Bank National Association Mitchell | $1.56 billion |
| 1st Financial Bank USA Dakota Dunes | $1.40 billion |
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