John S. Easton (February 28, 1865 – November 28, 1903) was an American baseball pitcher. He played in Major League Baseball from 1889 to 1894. Easton was born in Bridgeport, Ohio, in 1865. He began his baseball career in 1887 with a team from Zanesville, Ohio. He then played for teams in Sandusky and Springfield, Ohio.