Henry L. Frank (c. 1851–1908) was an American politician and businessman based in Montana.
A self-made entrepreneur who invested in liquor distribution, real estate and mining, he also founded the Silver Bow Electric Light Company, was president of the Butte Water Company, and was the first chairman of the board of trustees of the Montana State School of Mines, a position held until his death.
A Democrat, he was the 1896 chairman for the State Central Committee and was elected the presidential elector for Montana.
Henry Frank achieved the 33rd degree of Freemasonry and in 1905 became grand master of the Grand Lodge of Montana, and was also active in the Benevolent and Protective Order of Elks and Knights of Pythias lodges.
Henry L. Frank died under uncertain circumstances in 1908 at age 57 while visiting his mother in Cincinnati, Ohio.