EXHIBIT 11 PEOPLES BANCORP INC. AND SUBSIDIARIES Computation of Earnings Per Share For the Three For the Nine Months Ended Months Ended (dollars in thousands, except per share data) September 30, September 30, 2002 2001 2002 2001 -------------- --------------- -------------- --------------- BASIC EARNINGS PER SHARE EARNINGS: Income before extraordinary gain $ 4,619 $ 3,197 $ 13,309 $ 8,798 Net income $ 4,619 $ 3,197 $ 13,719 $ 8,798 AVERAGE SHARES OUTSTANDING: Weighted average Common Shares outstanding 7,896,663 7,889,519 7,870,408 7,914,815 - ----------------------------------------------------------------------------------------------------------------------------- BASIC EARNINGS PER SHARE: Income before extraordinary gain $ 0.58 $ 0.41 $ 1.69 $ 1.11 Net income $ 0.58 $ 0.41 $ 1.74 $ 1.11 ============================================================================================================================= DILUTED EARNINGS PER SHARE EARNINGS: Income before extraordinary gain $ 4,619 $ 3,197 $ 13,309 $ 8,798 Net income $ 4,619 $ 3,197 $ 13,719 $ 8,798 AVERAGE SHARES OUTSTANDING: Weighted average Common Shares outstanding 7,896,663 7,889,519 7,870,408 7,914,815 Net effect of the assumed exercise of stock options based on the treasury stock method 253,340 144,166 213,825 120,342 - ----------------------------------------------------------------------------------------------------------------------------- Total 8,150,003 8,033,685 8,084,233 8,035,157 - ----------------------------------------------------------------------------------------------------------------------------- BASIC EARNINGS PER SHARE: Income before extraordinary gain $ 0.57 $ 0.40 $ 1.65 $ 1.09 Net income $ 0.57 $ 0.40 $ 1.70 $ 1.09 =============================================================================================================================