| Wilcox County State Bank | Georgia |
| Wildfire Credit Union | Michigan |
| Wilkes-Barre City Employees Federal Credit Union | Pennsylvania |
| Wilkinson County Bank | Georgia |
| Willamette Community Bank | Oregon |
| Willamette Valley Bank | Oregon |
| William Penn Bank | Pennsylvania |
| Williamson County Catholic Credit Union | Illinois |
| Williamsport Teachers Credit Union | Pennsylvania |
| Williamstown Bank | West Virginia |
| Williamsville Federal Credit Union | New York |
| Williamsville State Bank & Trust | Illinois |
| Willis Credit Union | Tennessee |
| Willis Knighton Federal Credit Union | Louisiana |
| Willis-Knighton Federal Credit Union | New Jersey |
| Willow Island Federal Credit Union | West Virginia |
| Wilmac Employees' Credit Union | Pennsylvania |
| Wilmington Police & Fire Federal Credit Union | Delaware |
| Wilmington Postal Federal Credit Union | Delaware |
| Wilmington Savings Fund Society | Delaware |
| Wilmington Trust | Delaware |
| Wilshire Bank | California |
| Wilson Bank and Trust | Tennessee |
| Wilson & Muir Bank & Trust Company | Kentucky |
| Winchester Community Federal Credit Union | Virginia |
| Winchester Co-operative Bank | Massachusetts |
| Winchester Federal Bank | Kentucky |
| Winchester Federal Credit Union | Massachusetts |
| Winchester Savings Bank | Massachusetts |
| Windsor County South Credit Union | Vermont |
| Windsor Federal Savings and Loan Association | Connecticut |
| Windsor Locks Federal Credit Union | Connecticut |
| Windthorst Federal Credit Union | Texas |
| Windward Community Federal Credit Union | Hawaii |
| Wings Financial Credit Union | Minnesota |
| Win-Hood Co-Op Credit Union | Illinois |
| Winnebago Community Credit Union | Wisconsin |
| Winnsboro State Bank & Trust Company | Louisiana |
| Winona National Bank | Minnesota |
| Winslow Community Federal Credit Union | Maine |
| Winslow Santa Fe Credit Union | Arizona |
| Winslow School Employees Federal Credit Union | Arizona |
| Winston-Salem Federal Credit Union | North Carolina |
| Winter Hill Bank | Massachusetts |
| Winthrop Area Federal Credit Union | Maine |
| Winthrop State Bank | Minnesota |
| Winthrop-University Hospital Employees Federal Credit Union | New York |
| Wintrust Bank | Illinois |
| Wiregrass Federal Credit Union | Alabama |
| Wisconsin Bank & Trust | Wisconsin |
| Wisconsin Latvian Credit Union | Wisconsin |
| Wisconsin Medical Credit Union | Wisconsin |
| Wisconsin River Bank | Wisconsin |
| Witco Houston Employees Credit Union | Texas |
| WIT Federal Credit Union | New York |
| WJC Federal Credit Union | Virginia |
| WNC Community Credit Union | North Carolina |
| WNMH Credit Union | Kansas |
| Woburn Municipal Federal Credit Union | Massachusetts |
| WOD Federal Credit Union | Pennsylvania |
| Wolf Point Federal Credit Union | Montana |
| Wolf River Community Bank | Wisconsin |
| Wolverine Bank | Michigan |
| Wolverine Credit Union | Alabama |
| Woodco Federal Credit Union | Ohio |
| Wood County Community Federal Credit Union | West Virginia |
| Wood County Employees Credit Union | Wisconsin |
| Woodford State Bank | Wisconsin |
| Woodforest National Bank | Texas |
| Woodhaven National Bank | Texas |
| Wood & Huston Bank | Missouri |
| Woodland Bank | Minnesota |
| Woodlands Bank | Pennsylvania |
| Woodlands National Bank | Minnesota |
| Woodlawn Federal Credit Union | Rhode Island |
| Woodmen Federal Credit Union | Nebraska |
| Woodruff Federal Savings and Loan Association | South Carolina |
| Woodsboro Bank | Maryland |
| Woodsfield Savings Bank | Ohio |
| Woodstone Credit Union | Washington |
| Woodsville Guaranty Savings Bank | New Hampshire |
| WoodTrust Bank | Wisconsin |
| Woori America Bank | New York |
| Worcester Credit Union | Massachusetts |
| Worcester Fire Department Credit Union | Massachusetts |
| Worcester Police Department Credit Union | Massachusetts |
| Wor-Co Federal Credit Union | Maryland |
| Workers' Credit Union | Massachusetts |
| Workers Federal Credit Union | Connecticut |
| Workmen's Circle Credit Union | Georgia |
| World's Foremost Bank | Nebraska |
| Worthington Federal Savings Bank | Minnesota |
| Worthington National Bank | Texas |
| Worzalla Publishing Employees Credit Union | Wisconsin |
| Wray State Bank | Colorado |
| Wrentham Co-operative Bank | Massachusetts |
| WR Grace Maryland Employees Federal Credit Union | Maryland |
| Wright Patman Congressional Federal Credit Union | Virginia |
| Wright-Patt Credit Union | Ohio |
| WSB Municipal Bank | New York |