The 1911 Philadelphia Athletics season was a season in American baseball. The A's finished first in the American League with a record of 101 wins and 50 losses, then went on to defeat the New York Giants in the 1911 World Series, four games to two, for their second straight World Championship.

The Philadelphia Athletics were a Major League Baseball team that played in Philadelphia from 1901 to 1954, when they moved to Kansas City, Missouri, and became the Kansas City Athletics. Following another move in 1967, the team became the Oakland Athletics. In 2025 the franchise will move temporarily to Sacramento before permanently moving to Las Vegas.