| Bergen Federal Credit Union | New Jersey |
| Berkeley Community Federal Credit Union | South Carolina |
| Berkeley County Public Schools Federal Credit Union | West Virginia |
| Berkshire Bank | Massachusetts |
| Berkshire Federal Credit Union | Massachusetts |
| Berrien Teachers Federal Credit Union | Georgia |
| Berylco Employees' Credit Union | Pennsylvania |
| Bessemer System Federal Credit Union | Pennsylvania |
| Bessemer Trust Company | New Jersey |
| Bessemer Trust Company | New York |
| Besser Credit Union | Michigan |
| Best Financial Credit Union | Michigan |
| Best Food Bayonne Employees Federal Credit Union | New Jersey |
| Best Reward Credit Union | Ohio |
| BET Federal Credit Union | New York |
| Bethany Baptist Christian Federal Credit Union | Pennsylvania |
| Bethel A.M.E. Church Credit Union | Illinois |
| Bethel A.M.E. San Francisco Federal Credit Union | California |
| Bethel Baptist Church East Credit Union | Michigan |
| Bethex Federal Credit Union | New York |
| Bethlehem 1st Federal Credit Union | Pennsylvania |
| Bethpage Federal Credit Union | New York |
| Better Banks | Illinois |
| Beulah Federal Credit Union | New York |
| Beverly Bank | Massachusetts |
| Beverly Bank & Trust Company | Illinois |
| Beverly Bus Garage Federal Credit Union | Illinois |
| Beverly Municipal Federal Credit Union | Massachusetts |
| BFG Federal Credit Union | Ohio |
| Bi-County PTC Federal Credit Union | Michigan |
| Biddeford Savings Bank | Maine |
| BI Federal Credit Union | Pennsylvania |
| Big Bend Banks | Texas |
| Big Bethel A.M.E. Church Federal Credit Union | Georgia |
| Big Dutch Fleet Credit Union | Michigan |
| Big Horn Federal Savings Bank | Wyoming |
| Big Island Federal Credit Union | Hawaii |
| Big Sky Federal Credit Union | Montana |
| Big Spring Education Employees Federal Credit Union | Texas |
| Big Valley Federal Credit Union | California |
| Billerica Municipal Employees Credit Union | Massachusetts |
| Billings Federal Credit Union | Montana |
| Biloxi Teachers Federal Credit Union | Mississippi |
| Binsy Federal Credit Union | Tennessee |
| BIP Federal Credit Union | North Carolina |
| Bippus State Bank | Indiana |
| Birmingham-Bloomfield Credit Union | Michigan |
| Biscayne Bank | Florida |
| Bison Federal Credit Union | Oklahoma |
| Bison State Bank | Kansas |
| Bitterroot Community Federal Credit Union | Montana |
| Bivins Federal Credit Union | Texas |
| Blackhawk Bank | Wisconsin |
| Blackhawk Bank & Trust | Illinois |
| Blackhawk Community Credit Union | Wisconsin |
| Blackhawk Federal Credit Union | Pennsylvania |
| Black Hills Community Bank | South Dakota |
| Black Hills Federal Credit Union | South Dakota |
| Black Mountain Savings Bank | North Carolina |
| BlackRidgeBANK | North Dakota |
| Black River Country Bank | Wisconsin |
| Blackstone River Federal Credit Union | Rhode Island |
| Blair County Federal Credit Union | Pennsylvania |
| Blanco National Bank | Texas |
| Blaw-Knox Credit Union | Illinois |
| B&L Bank | Missouri |
| BLC Community Bank | Wisconsin |
| Blissfield State Bank | Michigan |
| BloomBank | Indiana |
| Bloomburg State Bank | Texas |
| Bloomfield Fire and Police Federal Credit Union | New Jersey |
| Bloomington Municipal Credit Union | Illinois |
| Bloomington Postal Employees Credit Union | Illinois |
| Bloomsdale Bank | Missouri |
| BluCurrent Credit Union | Missouri |
| Blue Chip Federal Credit Union | Pennsylvania |
| Blue Cross Blue Shield KC Credit Union | Missouri |
| Blue Cross Blue Shield of Maine Federal Credit Union | Maine |
| Blue Cross Texas Federal Credit Union | Texas |
| Blue Eagle Credit Union | Virginia |
| Blue Flame Credit Union | North Carolina |
| Blue Flame Credit Union | Alabama |
| Bluegrass Community Bank | Kentucky |
| Bluegrass Community Federal Credit Union | Kentucky |
| Blue Grass Federal Savings and Loan Association | Kentucky |
| Blue Grass Savings Bank | Iowa |
| BlueHarbor Bank | North Carolina |
| Blue Hills Bank | Massachusetts |
| Blue Mountain Credit Union | Washington |
| Blue Ridge Bank | Virginia |
| Blue Ridge Bank | South Carolina |
| Blue Ridge Bank and Trust Co. | Missouri |
| Bluescope Employees' Credit Union | Missouri |
| Bluestem Community Credit Union | Kansas |
| Blue Water Federal Credit Union | Michigan |
| BMH Federal Credit Union | Tennessee |
| BMI Federal Credit Union | Ohio |
| BMO Harris Bank | Illinois |
| BMO Harris Central | Illinois |
| B-MS Federal Credit Union | New Jersey |