George A. Decker (June 1, 1866 – June 7, 1909), was a professional baseball player who played outfielder in the Major Leagues from 1892-1899.

Decker played for the St. Louis Browns, Chicago Colts, Louisville Colonels, and Washington Senators.

In 704 games over eight seasons, Decker posted a .276 batting average (756-for-2739) with 423 runs, 25 home runs, 416 RBI and 112 stolen bases.

He finished his career with a .959 fielding percentage playing at every position except pitcher and catcher.