Henry Carl Gastright (March 29, 1865 – October 9, 1937) was an American 19th-century professional baseball pitcher.

He was with the Washington Senators (1892), Pittsburgh Pirates (1893), Boston Beaneaters (1893), Brooklyn Grooms (1894), and Cincinnati Reds (1896).

A native of Covington, Kentucky, the right-hander stood 6 ft 2 in (1.88 m) and weighed 190 lbs.

Another notable season for Gastright was 1893, when his combined mark of 15–5 while pitching for Pittsburgh and Boston gave him a winning percentage of .750, best in the National League.

This biographical article relating to an American baseball pitcher born in the 1860s is a stub.