FDIC-insured bank
Bank of Sun Prairie — Sun Prairie, WI
Bank headquartered in Sun Prairie, Wisconsin, part of BOSP BANCSHARES INC.
Source: FDIC BankFind Suite, data as of June 30, 2026, fetched September 5, 2026
Headquarters and contact
| Address | 228 E Main St Sun Prairie, WI 53590 |
| County | Dane |
| Metro area | Madison, WI |
| Website | www.bankofsunprairie.com |
| Phone | not published in FDIC data, see the bank's website |
FDIC record
| FDIC Certificate | 13565 |
| Federal Reserve RSSD ID | 124344 |
| Status | Active |
| Charter class | NM (STATE) |
| Holding company | BOSP BANCSHARES INC |
| Domestic offices | 8 |
| Financials as of | June 30, 2026 |
How to find your Bank of Sun Prairie 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.bankofsunprairie.com.
Share one credit line with people you trust. Everyone gets their own limit.
Offices nearest to headquarters
| Bank Of Sun Prairie main office Sun Prairie, WI |
228 E Main St, 53590 |
| Grand Avenue Office Branch Sun Prairie, WI |
695 S Grand Ave, 53590 |
| Sun Prairie West High School Branch Sun Prairie, WI |
2850 Ironwood Dr, 53590 |
| Cottage Grove Branch Cottage Grove, WI |
419 W Cottage Grove Rd, 53527 |
| Wittenberg Branch Wittenberg, WI |
201 E Westgor Ave, 54499 |
| Hatley Branch Hatley, WI |
410 State Road, 54440 |
| Banner Banks Branch Birnamwood, WI |
416 Main St, 54414 |
| Antigo Branch Antigo, WI |
100 S Superior St, 54409 |
Where Bank of Sun Prairie has offices
Cities with the most Bank of Sun Prairie offices
Largest banks headquartered elsewhere in Wisconsin
| Associated Bank, National Association Green Bay | $51.76 billion |
| Nicolet National Bank Green Bay | $15.39 billion |
| Johnson Bank Racine | $7.07 billion |
| Bank First, N.A. Manitowoc | $5.94 billion |
| John Deere Financial, f.s.b. Middleton | $4.93 billion |
| Town Bank, National Association Hartland | $4.71 billion |
| First Business Bank Madison | $4.41 billion |
| Lake Ridge Bank Middleton | $3.35 billion |
Compare before you open an account: today's CD and savings rates, the CD calculator and the savings calculator.
