EXHIBIT 11 PEOPLES BANCORP INC. AND SUBSIDIARIES Computation of Earnings Per Share (dollars in thousands, except share data) For the Three For the Six Months Ended Months Ended June 30, June 30, 1999 1998 1999 1998 ---------- ---------- ---------- ---------- BASIC EARNINGS PER SHARE EARNINGS: Net income ........................................ $ 2,549 $ 2,800 $ 5,179 $ 5,176 AVERAGE SHARES OUTSTANDING: Weighted average Common Shares outstanding ........ 6,281,877 6,329,995 6,298,652 6,325,825 - ------------------------------------------------------------------------------------------------------- BASIC EARNINGS PER SHARE ................... $ 0.41 $ 0.44 $ 0.82 $ 0.82 - ------------------------------------------------------------------------------------------------------- DILUTED EARNINGS PER SHARE EARNINGS: Net income ........................................ $ 2,549 $ 2,800 $ 5,179 $ 5,176 AVERAGE SHARES OUTSTANDING: Weighted average Common Shares outstanding ........ 6,281,877 6,329,995 6,298,652 6,325,825 Net effect of the assumed exercise of stock options based on the treasury stock method ........... 161,480 221,257 154,168 214,507 - ------------------------------------------------------------------------------------------------------- Total ................................... 6,443,357 6,551,252 6,452,820 6,540,332 - ------------------------------------------------------------------------------------------------------- DILUTED EARNINGS PER SHARE ................. $ 0.40 $ 0.43 $ 0.80 $ 0.79 - ------------------------------------------------------------------------------------------------------- * Adjusted for 10% stock dividend issued June 15, 1999, to shareholders of record as of May 28, 1999.