| KAH Credit Union | Iowa |
| Kahoka State Bank | Missouri |
| Kahuku Federal Credit Union | Hawaii |
| Kahului Federal Credit Union | Hawaii |
| Kaiperm Federal Credit Union | California |
| Kaiperm North Bay Federal Credit Union | California |
| KaiPerm NorthWest Federal Credit Union | Oregon |
| Kalamazoo Building Trades Credit Union | Michigan |
| Kalamazoo County State Bank | Michigan |
| Kaleida Health Federal Credit Union | New York |
| KALSEE Credit Union | Michigan |
| Kamehameha Federal Credit Union | Hawaii |
| Kamiah Community Credit Union | Idaho |
| Kan Colo Credit Union | Kansas |
| Kankakee Federation of Teachers Credit Union | Illinois |
| Kankakee Terminal Belt Credit Union | Illinois |
| Kansas Air Guard Credit Union | Kansas |
| Kansas Blue Cross-Blue Shield Credit Union | Kansas |
| Kansas City Credit Union | Missouri |
| Kansas City P&G Credit Union | Kansas |
| KansasLand Bank | Kansas |
| Kansas State Bank | Kansas |
| Kansas State Bank | Kansas |
| Kansas State University Federal Credit Union | Kansas |
| Kansas Teachers Community Credit Union | Kansas |
| Kanza Bank | Kansas |
| Kaplan State Bank | Louisiana |
| Karnes County National Bank | Texas |
| Kaskaskia Valley Credit Union | Illinois |
| Katahdin Federal Credit Union | Maine |
| Katahdin Trust Company | Maine |
| Kauai Community Federal Credit Union | Hawaii |
| Kauai Government Employees Federal Credit Union | Hawaii |
| Kauai Teachers Federal Credit Union | Hawaii |
| Kaw Valley Bank | Kansas |
| Kaw Valley State Bank | Kansas |
| Kaw Valley State Bank | Kansas |
| KBR Credit Union | Washington |
| KBR Heritage Federal Credit Union | Texas |
| KC Area Credit Union | Missouri |
| KCB Bank | Missouri |
| KC Fairfax Federal Credit Union | Kansas |
| KCK Firemen & Police Credit Union | Kansas |
| KC Police Credit Union | Missouri |
| K.C. Terminal Employees/Guadalupe Center Federal Credit Union | Missouri |
| KCUMB Credit Union | Missouri |
| Kearney Eaton Employees Federal Credit Union | Nebraska |
| Kearney Federal Credit Union | Nebraska |
| Kearney Trust Company | Missouri |
| Kearny Bank | New Jersey |
| Kearny Municipal Employees Federal Credit Union | New Jersey |
| K&E Employees Federal Credit Union | New Jersey |
| Keesler Federal Credit Union | Mississippi |
| Kekaha Federal Credit Union | Hawaii |
| KELCO Federal Credit Union | Maryland |
| Kellogg Community Federal Credit Union | Michigan |
| Kellogg Memphis Employees Federal Credit Union | Tennessee |
| Kellogg Midwest Federal Credit Union | Nebraska |
| Kelly Community Federal Credit Union | Texas |
| Kemba Charleston Federal Credit Union | West Virginia |
| Kemba Credit Union | Ohio |
| Kemba Delta Federal Credit Union | Tennessee |
| KEMBA Financial Credit Union | Ohio |
| Kemba Louisville Credit Union | Kentucky |
| Kemba Peoria Credit Union | Illinois |
| Kemba Roanoke Federal Credit Union | Virginia |
| Kendall State Bank | Kansas |
| Kenmore NY Teachers Federal Credit Union | New York |
| Kennaford Federal Credit Union | Pennsylvania |
| Kennametal Orwell Employees Federal Credit Union | Ohio |
| Kennebec Federal Savings and Loan Association of Waterville | Maine |
| Kennebec Savings Bank | Maine |
| Kennebunk Savings Bank | Maine |
| Kennedy VA Employees Federal Credit Union | Tennessee |
| Kennett National Bank | Missouri |
| Kenosha City Employees Credit Union | Wisconsin |
| Kenosha Police and Firemen's Credit Union | Wisconsin |
| Kenosha Postal Employees Credit Union | Wisconsin |
| Kenowa Community Federal Credit Union | Michigan |
| Kensington Bank | Minnesota |
| Kent County Credit Union | Michigan |
| Kent County Memorial Hospital Employees Federal Credit Union | Rhode Island |
| Kent Credit Union | Ohio |
| Kentland Bank | Indiana |
| Kentland Federal Savings and Loan Association | Indiana |
| Kentucky Bank | Kentucky |
| Kentucky Employees Credit Union | Kentucky |
| Kentucky Farmers Bank Corporation | Kentucky |
| Kentucky Federal Savings and Loan Association | Kentucky |
| Kentucky Neighborhood Bank | Kentucky |
| Keokuk Savings Bank | Iowa |
| Kerndt Brothers Savings Bank | Iowa |
| Kern Federal Credit Union | California |
| Kern Schools Federal Credit Union | California |
| Kerr County Federal Credit Union | Texas |
| KeyBank | Ohio |
| Key Community Bank | Minnesota |
| KeyPoint Credit Union | California |
| KeySavings Bank | Wisconsin |
| Keys Federal Credit Union | Florida |