Henry George Keller (April 3, 1869 – August 3, 1949) was an American artist who led a generation of Ohio watercolor painters of the Cleveland School.

Keller's students at the Cleveland School of Art and his Berlin Heights, Ohio summer school included Charles E. Burchfield, James Kulhanek, Paul Travis, August Biehle, and Frank N. Wilcox.

He maintains his better than average constitution, inherited from German-born parents, by regular life and exemplary habits.

Henry teaches painting at the Art School and specializes in animal life and watercolor.

His home was originally a farm house owned by his father before Cleveland grew up to be a city.