Benedict Joseph Zientara (February 14, 1918 – April 16, 1985) was a professional baseball infielder. He played all or part of four seasons in Major League Baseball (1941, 1946–48), playing mainly as a second baseman for the Cincinnati Reds. Listed at , 165 lb., he batted and threw right-handed.
A native of Chicago, Zientara was one of many major leaguers who saw his baseball career interrupted by a military stint during World War II. In parts of four seasons, he was a .254 hitter (230-for-906) with two home runs and 49 RBI in 278 games, including 106 runs, 29 doubles, five triples, and five stolen bases.
Zientara died in 1985 in Lake Elsinore, California, at the age of 67. He was buried at the Riverside National Cemetery in Riverside, California.