Harry Gladwin Byrd (February 3, 1925 – May 14, 1985) was an American Major League Baseball right-handed starting pitcher who played for the Philadelphia Athletics, New York Yankees, Baltimore Orioles, Chicago White Sox, and Detroit Tigers.

At the start of the 1954 season, he was part of a ten-player trade between the Athletics and Yankees.

In a seven-year career, Byrd compiled a 46–54 record with 381 strikeouts and a 4.35 ERA in 8272⁄3 innings.

Byrd lived in the small logging community of Mont Clare, just outside his birthplace of Darlington, South Carolina.

Darlington named a road after him (Harry Byrd Highway), which eventually became Bobo Newsom Highway, named after another major-league pitcher from the area (Hartsville).