Lawton S. Parker (1868–1954) was an American impressionist painter.
Born in Fairfield, Michigan, raised in Kearney, Nebraska, Parker studied at the Art Institute of Chicago. He traveled to France and studied at the Ecole des Beaux-Arts. After return to the United States, he resided in Chicago and taught at the Art Institute there.
He died at age 86 in Pasadena, California.