The City Series was the name of a series of intracity baseball games played between Major League Baseball's Philadelphia Athletics of the American League and its predecessors, and the Philadelphia Phillies of the National League that ran from 1883 through 1954. While the games were officially exhibitions, they were a matter of prestige in Philadelphia and a long rivalry existed between the players, management, and fans.

The 1903 Philadelphia Athletics season was a season in American baseball. The team finished second in the American League with a record of 75 wins and 60 losses, 14½ games behind the Boston Americans.