| IAA Credit Union | Illinois |
| iAB Financial Bank | Indiana |
| IAFF Local 317 Credit Union | West Virginia |
| IAM Community Federal Credit Union | Alabama |
| IBC Bank | Texas |
| Iberiabank | Louisiana |
| Iberia Parish Federal Credit Union | Louisiana |
| Iberville Bank | Louisiana |
| Iberville Federal Credit Union | Louisiana |
| IBEW 116 Federal Credit Union | Texas |
| IBEW 141 Federal Credit Union | West Virginia |
| IBEW 175 Federal Credit Union | Tennessee |
| IBEW 26 Federal Credit Union | Maryland |
| IBEW 317 Federal Credit Union | West Virginia |
| IBEW 76 Federal Credit Union | Washington |
| IBEW 968 Federal Credit Union | West Virginia |
| IBEW Community Federal Credit Union | Texas |
| IBEW Local #146 Credit Union | Illinois |
| IBEW Local 56 Federal Credit Union | Pennsylvania |
| IBEW Local 66 Federal Credit Union | Texas |
| IBEW Local #681 Credit Union | Texas |
| IBEW - Local No. 5 Federal Credit Union | Pennsylvania |
| IBEW Local Union 278 Federal Credit Union | Texas |
| IBEW Local Union 712 Federal Credit Union | Pennsylvania |
| IBEW Local Union 80 Federal Credit Union | Virginia |
| IBEW Members + Credit Union | California |
| IBEW/SJ Cascade Federal Credit Union | Oregon |
| IBEW & United Workers Federal Credit Union | Oregon |
| IBM Southeast Employees Federal Credit Union | Florida |
| IC Federal Credit Union | Pennsylvania |
| IC Federal Credit Union | Massachusetts |
| ICI America Federal Credit Union | Delaware |
| Icon Bank of Texas | Texas |
| Icon Credit Union | Idaho |
| ICS Federal Credit Union | New York |
| Idabel National Bank | Oklahoma |
| Idaho Central Credit Union | Idaho |
| Idaho First Bank | Idaho |
| Idaho Independent Bank | Idaho |
| Idaho State University Federal Credit Union | Idaho |
| Idaho Trust Bank | Idaho |
| Idaho United Credit Union | Idaho |
| IDB-IIC Federal Credit Union | District of Columbia |
| Ideal Credit Union | Minnesota |
| IEC Federal Credit Union | Illinois |
| IFF Employees Federal Credit Union | New Jersey |
| IH Credit Union | Ohio |
| IH Mississippi Valley Credit Union | Illinois |
| ILA 1351 Federal Credit Union | Texas |
| ILA 28 Federal Credit Union | Texas |
| ILA Federal Credit Union | Virginia |
| ILA Local 1235 Federal Credit Union | New Jersey |
| Illiana Financial Credit Union | Illinois |
| Illini Bank | Illinois |
| Illini State Bank | Illinois |
| Illinois Bank & Trust | Illinois |
| Illinois Community Credit Union | Illinois |
| Illinois Educators Credit Union | Illinois |
| Illinois National Bank | Illinois |
| Illinois-Service Federal Savings and Loan Association | Illinois |
| Illinois State Credit Union | Illinois |
| Illinois State Police Federal Credit Union | Illinois |
| Illinois Valley Credit Union | Illinois |
| Illinois Wesleyan University Federal Credit Union | Illinois |
| ILWU Credit Union | California |
| ILWU-FSC Federal Credit Union | California |
| IM Detroit District Credit Union | Michigan |
| IMECO Federal Credit Union | Indiana |
| Immaculate Conception Fall River Federal Credit Union | Massachusetts |
| Immaculate Heart of Mary Credit Union | Louisiana |
| Immanuel Baptist Church Federal Credit Union | Connecticut |
| Impact Bank | Kansas |
| Impact Credit Union | Ohio |
| Imperial Credit Union | Illinois |
| Incenta Federal Credit Union | Ohio |
| Incommons Bank | Texas |
| Independence Bank | Montana |
| Independence Bank | Ohio |
| Independence Bank | Rhode Island |
| Independence Bank of Georgia | Georgia |
| Independence Bank of Kentucky | Kentucky |
| Independence Federal Credit Union | Missouri |
| Independence National Bank | South Carolina |
| Independence State Bank | Wisconsin |
| Independence Teachers Credit Union | Missouri |
| Independence Trust Company | Tennessee |
| Independent Bank | Texas |
| Independent Bank | Michigan |
| Independent Bank | Tennessee |
| Independent Employers Group Federal Credit Union | Hawaii |
| Independent Farmers Bank | Missouri |
| Independent Federal Credit Union | Indiana |
| Indiana Business Bank | Indiana |
| Indiana First Savings Bank | Pennsylvania |
| Indiana Heartland Federal Credit Union | Indiana |
| Indiana Lakes Federal Credit Union | Indiana |
| Indiana Members Credit Union | Indiana |
| Indianapolis' Newspaper Federal Credit Union | Indiana |
| Indiana State University Federal Credit Union | Indiana |
| Indiana United Methodist Federal Credit Union | Indiana |