John Harold Kroner (November 13, 1908 – April 26, 1968) was a second baseman in Major League Baseball who played from 1935 through 1938 for the Boston Red Sox (1935–36) and Cleveland Indians (1937–38). Listed at 6 ft 0 in (1.83 m), 185 lb., Kroner batted and threw right-handed. He was born in St. Louis, Missouri.
In a four-season career, Kroner was a .262 hitter (184-for-702) with seven home runs and 105 RBI in 223 games, including 83 runs, 47 doubles, nine triples, three stolen bases, and a .327 on-base percentage.
Kroner died in his hometown of St. Louis, Missouri, at age 59.