Christian Henry Hartje (March 25, 1915 – June 26, 1946) was a professional baseball player, primarily in the minor leagues. Born in San Francisco, he was a catcher and played in nine games for the Brooklyn Dodgers in the major leagues in September during the 1939 baseball season. Hartje served with the U.S. Coast Guard during World War II, and was buried in the Golden Gate National Cemetery in San Bruno, California.