| Capital Bank | Florida |
| Capital Bank of Texas | Texas |
| Capital City Bank | Florida |
| Capital City Bank | Kansas |
| Capital City Press Federal Credit Union | Louisiana |
| Capital Communications Federal Credit Union | New York |
| Capital Community Bank | Utah |
| Capital Credit Union | North Dakota |
| Capital Credit Union | Wisconsin |
| Capital Educators Federal Credit Union | Idaho |
| Capital One Bank | Virginia |
| Capital One Bank (USA) | Virginia |
| Capitol Bank | Wisconsin |
| Capitol Credit Union | Texas |
| Capitol Federal Savings Bank | Kansas |
| Capitol National Bank | Michigan |
| Capitol View Credit Union | Iowa |
| Capon Valley Bank | West Virginia |
| Caprock Federal Credit Union | Texas |
| Caprock Santa Fe Credit Union | Texas |
| CapStar Bank | Tennessee |
| Capstone Bank | Alabama |
| Capstone Federal Credit Union | California |
| Carbondale Highway Credit Union | Illinois |
| Carco Federal Credit Union | Maryland |
| Cardinal Bank | Virginia |
| Cardozo Lodge Federal Credit Union | Pennsylvania |
| Carey Poverello Federal Credit Union | Ohio |
| Carle Employees Federal Credit Union | Illinois |
| Carmel Brotherhood Federal Credit Union | Ohio |
| Carmine State Bank | Texas |
| Carnegie Mellon University Federal Credit Union | Pennsylvania |
| Carolina Alliance Bank | South Carolina |
| Carolina Bank | North Carolina |
| Carolina Bank & Trust Co. | South Carolina |
| Carolina Collegiate Federal Credit Union | South Carolina |
| Carolina Cooperative Federal Credit Union | North Carolina |
| Carolina Federal Credit Union | North Carolina |
| Carolina Foothills Federal Credit Union | South Carolina |
| Carolina Postal Credit Union | North Carolina |
| Carolina Premier Bank | North Carolina |
| Carolinas Telco Federal Credit Union | North Carolina |
| Carolina Trust Bank | North Carolina |
| Carolina Trust Federal Credit Union | South Carolina |
| Carpenters Federal Credit Union | Minnesota |
| Carroll Bank and Trust | Tennessee |
| Carroll Community Bank | Maryland |
| Carroll County Savings and Loan Association | Missouri |
| Carroll County School Employees Federal Credit Union | Virginia |
| Carroll County State Bank | Iowa |
| Carroll County Trust Company of Carrollton | Missouri |
| Carrollton Bank | Illinois |
| Carrollton Federal Bank | Kentucky |
| Carson Bank | Kansas |
| Carter Bank & Trust | Virginia |
| Carter Federal Credit Union | Louisiana |
| Carthage Federal Savings and Loan Association | New York |
| Carus Employees Credit Union | Illinois |
| Carver Branch Federal Credit Union | Louisiana |
| Carver Federal Savings Bank | New York |
| Carver State Bank | Georgia |
| Carville Employees Federal Credit Union | Louisiana |
| Cascade Central Credit Union | Oregon |
| Cascade Community Federal Credit Union | Oregon |
| Cascade Federal Credit Union | Washington |
| Casco Federal Credit Union | Maine |
| Casebine Community Credit Union | Iowa |
| CASE Credit Union | Michigan |
| CASE Federal Credit Union | Texas |
| Casey State Bank | Illinois |
| Cashmere Valley Bank | Washington |
| Cass Commercial Bank | Missouri |
| Cass County Bank | Nebraska |
| Castle Rock Bank | Minnesota |
| Castle Rock Bank | Colorado |
| Castparts Employees Federal Credit Union | Oregon |
| Castroville State Bank | Texas |
| Catahoula - LaSalle Bank | Louisiana |
| Catasauqua Area Federal Credit Union | Pennsylvania |
| Cathay Bank | California |
| Catholic & Community Credit Union | Illinois |
| Catholic Credit Union | Wisconsin |
| Catholic Family Credit Union | Missouri |
| Catholic Family Federal Credit Union | Kansas |
| Catholic Federal Credit Union | Michigan |
| Catholics United Credit Union | Kansas |
| Catholic United Financial Credit Union | Minnesota |
| Catholic Vantage Financial Federal Credit Union | Michigan |
| Catskill Hudson Bank | New York |
| Cattaraugus County Bank | New York |
| Cattaraugus County Employees Federal Credit Union | New York |
| Cayuga Lake National Bank | New York |
| CBank | Ohio |
| CBC Bank | Missouri |
| CBC Federal Credit Union | Pennsylvania |
| CBC Federal Credit Union | California |
| CBC National Bank | Florida |
| CBI Bank & Trust | Iowa |
| CBI Federal Credit Union | Illinois |
| CB&S Bank | Alabama |