EXHIBIT 11 FIRST KEYSTONE CORPORATION COMPUTATION OF EARNINGS PER COMMON SHARE Quarter Ended June 30, 1997 1996 (Dollars in Thousands) Primary Net Income $ 1,147 $ 1,093 Shares<F1> Weighted average number of common shares outstanding 977,909 977,909 Adjustments - increases or decreases None None Weighted average number of common shares outstanding as adjusted 977,909 977,909 Primary earnings per common share $ 1.17 $ 1.12 Assuming full dilution Net Income $ 1,147 $ 1,093 Shares<F1> Weighted average number of common shares outstanding 977,909 977,909 Adjustments - increases or decreases None None Weighted average number of common shares outstanding as adjusted 977,909 977,909 Earnings per common share assuming full dilution $ 1.17 $ 1.12 <FN> <F1> Restated to reflect 10% stock dividends paid in 1996. </FN>