Exhibit 12.1 REDWOOD EMPIRE BANCORP AND SUBSIDIARIES COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (in thousands, except ratios) Year Ended December 31, 1997 ------------ EXCLUDING INTEREST ON DEPOSITS Net income $3,441 Tax provision 2,266 Fixed charges: Other interest expense 1,359 ------------ Earnings before taxes and fixed charges $7,066 ------------ ------------ Ratio of earnings to fixed charges 5.20 ------------ ------------ INCLUDING INTEREST ON DEPOSITS Fixed charges, per above $1,359 Interest on deposits 15,428 ------------ Total fixed charges and interest on deposits $16,787 ------------ ------------ Earnings before taxes and fixed charges, per above $7,066 Interest on deposits 15,428 ------------ Total earnings before taxes, fixed charges and interest on deposits $22,494 ------------ ------------ Ratio of earnings to fixed charges 1.34 ------------ ------------ Surplus $5,707 ------------ ------------ The 1997 earnings are adequate to cover fixed charges by the amount noted above.