Exhibit 11 Statement of computation of earnings per share. 194 Statements re: Computation of Earnings Per Share Brenton Banks, Inc. December 31, 1998 1997 1996 Basic EPS Computation Numerator: Net income $ 20,350,921 $ 18,010,107 $ 14,015,430 Denominator: Average common shares outstanding 18,957,449 19,255,188 19,900,974 Basic EPS $ 1.07 $ 0.94 $ 0.70 Diluted EPS Computation Numerator: Net income $ 20,350,921 $ 18,010,107 $ 14,015,430 Denominator: Average common shares outstanding 18,957,449 19,255,188 19,900,974 Average stock options 389,555 312,303 176,873 Average long-term stock compensation plan --- 154,169 215,082 19,347,004 19,721,660 20,292,929 Diluted EPS $ 1.05 $ 0.91 $ 0.69 <FN> Note: Amounts are restated for the 2-for-1 stock split effective February 1998 and the 10 percent common stock dividends effective in 1998 and 1997. 195