John Ernest Miller (born May 30, 1941) is an American former professional baseball player. He played in all or part of five seasons in Major League Baseball for the Baltimore Orioles between 1962 through 1967.
Miller was originally signed as an amateur free agent prior to the 1961 season by the Baltimore Orioles. He was part of the 1966 World Series championship team, although he did not appear in the postseason. On May 10, 1967, his contract was purchased from the Orioles by the New York Mets, but he never appeared in a major league game for them, spending the remainder of the season with the Triple-A Jacksonville Suns. After spending 1968 with the independent High Point-Thomasville Hi-Toms of the Carolina League, Miller retired.
Miller was born in Baltimore, Maryland.