EXHIBIT 21 WEST ONE BANCORP LIST OF SUBSIDIARIES AS OF DECEMBER 31, 1993 West One Bancorp, its subsidiaries, and the state of incorporation of each are listed below. The name of each subsidiary is indented under the name of its immediate parent. Each subsidiary does business only under the name shown. State Name of Incorporation West One Bancorp Idaho West One Bank, Idaho Idaho West One Insurance Services, Inc. Idaho West One Bank, Washington Washington West One Bank, Utah Utah West One Leasing Company Utah Tracy Collins Mortgage Company Utah West One Bank, Oregon Oregon West One Bank, Oregon, S.B. Oregon Ward Cook, Inc. Oregon WF Service Corporation Oregon Idaho First Bank Idaho West One Financial Services, Inc. Idaho West One Trust Company Utah West One Trust Company, Washington Washington West One Life Insurance Company Arizona Robideaux Properties, Inc. Utah