Exhibit 21 Subsidiaries. 280 Subsidiaries The subsidiaries of Brenton Banks, Inc., their location, the jurisdiction in which they are incorporated or organized, and the names under which subsidiaries do business are: Name Under which Subsidiary Jurisdiction in Does Business and Location which Incorporated or of Subsidiary Organized Banks Brenton Savings Bank, FSB United States Ames, Iowa Brenton Bank Iowa Des Moines, Iowa Non-Bank Subsidiaries Brenton Investments, Inc. Iowa Des Moines, Iowa Brenton Insurance Services, Inc. Iowa Des Moines, Iowa Brenton Mortgages, Inc. Iowa Des Moines, Iowa Brenton Insurance Inc. Iowa Adel, Iowa Brenton Realty Services, Ltd. Iowa Marshalltown, Iowa Brenton Savings Financial Services, Inc. Iowa Ames, Iowa 281