EXHIBIT 11 Washington Trust Bancorp, Inc. Computation of Per Share Earnings For the Periods Ended June 30, 2003 and 2002 Three months ended June 30, 2003 2002 - ---------------------------------------------------------------------------------------------------------------------- (In thousands, except per share amounts) Basic Diluted Basic Diluted ----------------- ---------------- ----------------- ---------------- Net income $4,574 $4,574 $4,024 $4,024 Share amounts: Average outstanding 13,089.4 13,089.4 12,858.7 12,858.7 Common stock equivalents - 215.5 - 206.4 - ------------------------------------------------ ----------------- ---------------- ----------------- ---------------- Weighted average outstanding 13,089.4 13,304.9 12,858.7 13,065.1 - ------------------------------------------------ ----------------- ---------------- ----------------- ---------------- Earnings per share $.35 $.34 $.31 $.31 - ------------------------------------------------ ----------------- ---------------- ----------------- ---------------- Six months ended June 30, 2003 2002 - ---------------------------------------------------------------------------------------------------------------------- (In thousands, except per share amounts) Basic Diluted Basic Diluted ----------------- ---------------- ----------------- ---------------- Net income $9,324 $9,324 $7,768 $7,768 Share amounts: Average outstanding 13,074.4 13,074.4 12,434.1 12,434.1 Common stock equivalents - 190.8 - 188.3 - ------------------------------------------------ ----------------- ---------------- ----------------- ---------------- Weighted average outstanding 13,074.4 13,265.2 12,434.1 12,622.4 - ------------------------------------------------ ----------------- ---------------- ----------------- ---------------- Earnings per share $.71 $.70 $.62 $.62 - ------------------------------------------------ ----------------- ---------------- ----------------- ----------------