EXHIBIT 21.1 SUBSIDIARIES OF IMPERIAL BANCORP All of the following subsidiaries of the Company are California corporations except Imperial International Bank which is organized under the laws of the United States and Imperial Trade Services, Ltd., which is incorporated in Hong Kong. Each subsidiary is included in the Company's consolidated financial statements. Crown American Bank Imperial Bank 100% Imperial Asset Advisors, Inc. Imperial Bank 100% Imperial Asset Management, Inc. Imperial Bank 100% Imperial Bank Imperial Bancorp 100% Imperial Bank Realty Company, Inc. Imperial Bancorp 100% Imperial Capital Trust I Imperial Bancorp 100% Imperial Creditcorp Imperial Bancorp 100% Imperial International Bank Imperial Bank 100% Imperial Securities Corporation Imperial Bank 100% Imperial Trade Services, Ltd. Imperial Bank 100% Imperial Trust Company Imperial Bank 100% Imperial Ventures, Inc. Imperial Bank 100% Official Payments Corporation Imperial Bank 56% Pacific Bancard Association, Inc. Imperial Bank 100% ROC Technologies, Inc. Imperial Bancorp 100% Imperial Capital Markets Group, Inc. (1) Imperial Bank 100% Imperial Financial Group (1) Imperial Bank 100% Imperial Global Trading Company, Inc. (1) Imperial Bank 100% Imperial Holdings, Inc. (1) Imperial Bank 100% Imperial Management, Inc. (1) Imperial Bank 100% Imperial Municipal Services Group, Inc. (1)(2) Imperial Bank 100% Imperial Plan, Inc. (1) Imperial Bank 100% TNT Mortgage Services, Inc. (1) Imperial Bank 100% (1) Not currently active (2) Previously known as Imperial Municipal Services Corporation