Harry Luther Haines (February 1, 1880 in Red Lion, Pennsylvania – March 29, 1947) was an American businessman who served five terms as a Democratic member of the U.S. House of Representatives from Pennsylvania from 1931 to 1943.

[3][4] He was engaged in the manufacture and brokerage of cigars from 1906 to 1934, and was a burgess of Red Lion from 1921 to 1930, as well as a delegate to the Democratic State Convention in 1918.

[5] Haines was elected as a Democrat to the Seventy-second and to the three succeeding Congresses.

[8] He was again elected in 1940 to the Seventy-seventh Congress, but was an unsuccessful candidate for reelection in 1942.

[9][10] After his time in Congress, he briefly worked as editor of the plant magazine of the York Safe & Lock Co. from 1943 to 1944.