| Arkansas Valley Federal Credit Union | Colorado |
| Ark City Teachers Credit Union | Kansas |
| Ark Valley Credit Union | Kansas |
| Arlington Community Federal Credit Union | Virginia |
| Arlington Hotel Federal Credit Union | Arkansas |
| Arlington K of C #109 Federal Credit Union | Massachusetts |
| Arlington Municipal Federal Credit Union | Massachusetts |
| Arlington State Bank | Minnesota |
| Armed Forces Bank | Kansas |
| Armstrong Associates Federal Credit Union | Pennsylvania |
| Armstrong Bank | Oklahoma |
| Armstrong County Building and Loan Association | Pennsylvania |
| Armstrong County Federal Employees Federal Credit Union | Pennsylvania |
| Army Aviation Center Federal Credit Union | Alabama |
| Arnold Bakers Employees Federal Credit Union | Connecticut |
| Aroostook County Federal Savings and Loan Association | Maine |
| Arrowhead Bank | Texas |
| Arrowhead Central Credit Union | California |
| ArrowPointe Federal Credit Union | South Carolina |
| Arsenal Credit Union | Missouri |
| Artesia Credit Union | New Mexico |
| Artesian City Federal Credit Union | Georgia |
| Arthur State Bank | South Carolina |
| Artisans' Bank | Delaware |
| Artmet Federal Credit Union | Massachusetts |
| Arundel Federal Savings Bank | Maryland |
| Arvest Bank | Arkansas |
| ASA Federal Credit Union | Connecticut |
| Asbestos Workers Local 14 Federal Credit Union | Pennsylvania |
| Asbestos Workers Local 53 Federal Credit Union | Louisiana |
| Asbury Federal Credit Union | District of Columbia |
| Ascend Federal Credit Union | Tennessee |
| Ascension Credit Union | Louisiana |
| Ascentia Federal Credit Union | North Dakota |
| Ascentra Credit Union | Iowa |
| ASE Federal Credit Union | Maryland |
| A&S Federal Credit Union | Pennsylvania |
| ASH Employees Credit Union | Illinois |
| Asheville Savings Bank | North Carolina |
| Ashland Community Federal Credit Union | Ohio |
| Ashland Credit Union | Kentucky |
| Ashoka Credit Union | Colorado |
| Ashton State Bank | Nebraska |
| Ashton State Bank | Iowa |
| Asian Bank | Pennsylvania |
| Asian Pacific National Bank | California |
| ASI Federal Credit Union | Louisiana |
| Aspire Federal Credit Union | New Jersey |
| Assemblies of God Credit Union | Missouri |
| Associated Bank | Wisconsin |
| Associated Credit Union Credit Union | Georgia |
| Associated Credit Union of Texas | Texas |
| Associated Federal Credit Union | Indiana |
| Associated Federal Employees Federal Credit Union | Utah |
| Associated Healthcare Credit Union | Minnesota |
| Associated School Employees Credit Union | Ohio |
| Associates Federal Credit Union | Connecticut |
| Assumption Beaumont Federal Credit Union | Texas |
| Astera Credit Union | Michigan |
| Astoria Bank | New York |
| Astra Bank | Kansas |
| Atascosa National Bank | Texas |
| Atchison Village Credit Union | California |
| ATD Federal Credit Union | California |
| Athens Area Credit Union | Wisconsin |
| Athens Federal Community Bank | Tennessee |
| Athens State Bank | Illinois |
| Athol Credit Union | Massachusetts |
| Athol Savings Bank | Massachusetts |
| Atkins Savings Bank & Trust | Iowa |
| Atlanta Federal Credit Union | Georgia |
| Atlanta Postal Credit Union | Georgia |
| Atlantic Capital Bank | Tennessee |
| Atlantic City Electric Company Employees Federal Credit Union | New Jersey |
| Atlantic City Federal Credit Union | Wyoming |
| Atlantic City Firemen's Federal Credit Union | New Jersey |
| Atlantic City Police Federal Credit Union | New Jersey |
| Atlantic Coast Bank | Florida |
| Atlantic Community Bank | South Carolina |
| Atlantic Community Bankers Bank | Pennsylvania |
| Atlantic County NJ Employees Federal Credit Union | New Jersey |
| Atlantic Financial Federal Credit Union | Maryland |
| Atlantic Greyhound Federal Credit Union | West Virginia |
| Atlantic Health Employees Federal Credit Union | New Jersey |
| Atlantic National Bank | Georgia |
| Atlantic Regional Federal Credit Union | Maine |
| Atlantic Stewardship Bank | New Jersey |
| Atlantic Trust Company | Georgia |
| Atlas Credit Union | Missouri |
| ATL Federal Credit Union | Michigan |
| Atomic Credit Union | Ohio |
| Atrium Credit Union | Ohio |
| AT&T Employees Pittsburgh Federal Credit Union | Pennsylvania |
| Attica Wyoming Correctional Employees Federal Credit Union | New York |
| Attleboro Municipal Employees Federal Credit Union | Massachusetts |
| AUB Employees' Credit Union | Tennessee |
| AuburnBank | Alabama |
| Auburn Banking Company | Kentucky |
| Auburn Community Federal Credit Union | New York |
| Auburn Savings Bank | Maine |