John Sidney Ross (June 27, 1892 – April 22, 1935) was a Major League Baseball pitcher. Ross appeared for the New York Giants in one game during the 1918 season, in relief. In that appearance, Ross pitched in 2.1 innings, and gave up two hits, with two strikeouts. He batted and threw left-handed.
Ross was born in San Rafael, California, and died in Amityville, New York.