| C1 Bank | Florida |
| CAANO Employees Federal Credit Union | Louisiana |
| Cabisco Federal Credit Union | North Carolina |
| Cable Federal Credit Union | Indiana |
| Cabool State Bank | Missouri |
| Cabot Boston Credit Union | Massachusetts |
| Cabot Employees Credit Union | Louisiana |
| Cabot Employees Credit Union | Louisiana |
| Cabot & NOI Employees Credit Union | Texas |
| Cabrillo Credit Union | California |
| CABWAY TELCO Federal Credit Union | West Virginia |
| Cache Bank and Trust | Colorado |
| Cache Valley Bank | Utah |
| CACL Federal Credit Union | Pennsylvania |
| Caddo Parish Teachers Federal Credit Union | Louisiana |
| Cadence Bank | Alabama |
| Cadets Federal Credit Union | New York |
| Cadmus Credit Union | Virginia |
| Calcasieu Parish Employees Federal Credit Union | Louisiana |
| Calcasieu Teachers and Employees Credit Union | Louisiana |
| Calcite Credit Union | Michigan |
| Calcoe Federal Credit Union | Washington |
| Cal-Com Federal Credit Union | California |
| Cal-Com Federal Credit Union | Texas |
| Caldwell Bank & Trust Company | Louisiana |
| Cal-Ed Federal Credit Union | Pennsylvania |
| Calhoun County Bank | West Virginia |
| Calhoun-Liberty Employees Credit Union | Florida |
| California Adventist Federal Credit Union | California |
| California Agribusiness Credit Union | California |
| California Bank of Commerce | California |
| California Bank & Trust | California |
| California Bear Credit Union | California |
| California Business Bank | California |
| California Coast Credit Union | California |
| California Community Credit Union | California |
| California Credit Union | California |
| California First National Bank | California |
| California Lithuanian Credit Union | California |
| California Pacific Bank | California |
| California Republic Bank | California |
| California State & Federal Employee's Credit Union #20 | California |
| California United Bank | California |
| Call Federal Credit Union | Virginia |
| Cal Poly Federal Credit Union | California |
| Cal State LA Federal Credit Union | California |
| Caltech Employees Federal Credit Union | California |
| Calumet Bank | Georgia |
| Calumet County Bank | Wisconsin |
| Calusa Bank | Florida |
| Calvary Baptist of Pacoima Federal Credit Union | California |
| Cambridge Firefighters Federal Credit Union | Massachusetts |
| Cambridge Municipal Employees Federal Credit Union | Massachusetts |
| Cambridge Savings Bank | Massachusetts |
| Cambridge State Bank | Minnesota |
| Cambridge Teachers Federal Credit Union | Massachusetts |
| Cambridge Trust Company | Massachusetts |
| CAMC Federal Credit Union | West Virginia |
| Camden Clark Memorial Hospital Federal Credit Union | West Virginia |
| Camden Firemen's Credit Union | New Jersey |
| Camden National Bank | Maine |
| Camden Police Federal Credit Union | New Jersey |
| Camino Federal Credit Union | California |
| Campbell County Bank | South Dakota |
| Campbell County Employees' Credit Union | Virginia |
| Campbell Employees Federal Credit Union | New Jersey |
| Campco Federal Credit Union | Wyoming |
| Camp Grove State Bank | Illinois |
| Camp Shelby Federal Credit Union | Mississippi |
| Campus Credit Union | Kansas |
| Campus Federal Credit Union | Louisiana |
| Campus State Bank | Illinois |
| Campus USA Credit Union | Florida |
| Canaan Credit Union | Illinois |
| Canadian Imperial Bank of Commerce | California |
| Canals & Trails Credit Union | Illinois |
| Canandaigua Federal Credit Union | New York |
| Canandaigua National Bank & Trust | New York |
| CanDo Credit Union | Ohio |
| Cannon Federal Credit Union | New Mexico |
| Canoga Postal Federal Credit Union | California |
| Canton Co-operative Bank | Massachusetts |
| Canton School Employees Federal Credit Union | Ohio |
| Canton State Bank | Missouri |
| Canyon Community Bank | Arizona |
| Canyon State Credit Union | Arizona |
| Capaha Bank | Illinois |
| Cape Ann Savings Bank | Massachusetts |
| Cape Cod Co-operative Bank | Massachusetts |
| Cape Cod Five | Massachusetts |
| Cape Regional Credit Union | Missouri |
| Capital Area Federal Credit Union | Maine |
| Capital Area Realtors Federal Credit Union | Maryland |
| Capital Area Taiwanese Federal Credit Union | Maryland |
| Capital Bank | Minnesota |
| Capital Bank | Georgia |
| Capital Bank | Texas |
| Capital Bank | Maryland |
| Capital Bank | Texas |
| Capital Bank | California |