Lovell Birge Harrison (October 28, 1854, Philadelphia, Pennsylvania - 1929) was an American genre and landscape painter, teacher and writer. He was a prominent practitioner and advocate of Tonalism.
Born in Philadelphia, Birge Harrison was the brother of artist T. Alexander Harrison. He studied first at the Pennsylvania Academy of the Fine Arts in 1874, and later credited Thomas Eakins as a positive influence on his own teaching style. He then went to Paris on the advice of John Singer Sargent to study with Carolus-Duran and at the École des Beaux-Arts under Cabanel. In 1881 Harrison exhibited at the Paris Salon, and in 1882 his Salon entry, Novembre, became one of the first paintings by an American artist to be purchased by the French government.