| Auburn State Bank | Nebraska |
| Auburn University Federal Credit Union | Alabama |
| Audubon Federal Credit Union | Kentucky |
| Audubon Savings Bank | New Jersey |
| Audubon State Bank | Iowa |
| Augusta County Federal Credit Union | Virginia |
| Augusta Health Care Credit Union | Virginia |
| Augusta Metro Federal Credit Union | Georgia |
| Augusta VAH Federal Credit Union | Georgia |
| Aurora Credit Union | Wisconsin |
| Aurora Federal Credit Union | Colorado |
| Aurora Firefighters' Credit Union | Illinois |
| Aurora Policemen Credit Union | Illinois |
| Aurora Postal Employees Credit Union | Illinois |
| Aurora Schools Federal Credit Union | Colorado |
| Austin Bank | Texas |
| Austin Capital Bank SSB | Texas |
| Austin City Employees Credit Union | Minnesota |
| Austin County State Bank | Texas |
| Austin Federal Credit Union | Texas |
| Austin Telco Federal Credit Union | Texas |
| Auto Club Federal Credit Union | California |
| Auto Club Trust | Michigan |
| Automatic Data Processing Federal Credit Union | New Jersey |
| Automotive Aftermarket Employee Federal Credit Union | Maryland |
| Auto-Owners Associates Credit Union | Michigan |
| Autotruck Financial Credit Union | Kentucky |
| Avadian Credit Union Acquired | Alabama |
| Avadian Credit Union | Alabama |
| Avanti Federal Credit Union | South Dakota |
| AVB Bank | Oklahoma |
| Aventa Credit Union | Colorado |
| Avenue Bank | Tennessee |
| Avenue Baptist Brotherhood Federal Credit Union | Louisiana |
| Avestar Credit Union | Wisconsin |
| Avidbank | California |
| Avidia Bank | Massachusetts |
| Avista Corp. Credit Union | Washington |
| Avon Co-operative Bank | Massachusetts |
| Avon State Bank | Minnesota |
| Avoyelles Parish School Board Employees Federal Credit Union | Louisiana |
| Awakon Federal Credit Union | Michigan |
| Axiom Bank | Florida |
| Axton Federal Credit Union | Kentucky |
| A.Y. McDonald Employees Credit Union | Iowa |
| Azalea City Credit Union | Alabama |