Reginald Marsh was born on March 14, 1898, in Paris, where both his parents — American artists — were living, and grew up in Nutley, New Jersey. He graduated from Yale University in 1920 and moved to New York City to pursue a career as a freelance illustrator, finding early success with caricatures and sketches for the New York Daily News and, from 1925, The New Yorker. A casual desire to learn painting led him to enroll at the Art Students League of New York in 1921, where his first teacher was John Sloan, the Ashcan School master whose commitment to depicting unglamorous urban life would leave a lasting impression on Marsh's own work. Later trips to Europe between 1925 and 1929 reinforced a deep admiration for the technical ambition of the Old Masters — Rubens, Tintoretto, Michelangelo — whose dynamic compositions and vigorous handling of the human figure Marsh worked throughout his career to adapt to contemporary American subjects.
Marsh's great subject was the teeming, unruly spectacle of New York City, particularly its less polished precincts. He painted Coney Island's crowded beaches, the burlesque theaters of 14th Street, the elevated railway, and the men of the Bowery with an energy and density that owed as much to Renaissance painting as to newspaper reportage. Working in egg tempera, oil, watercolor, and ink, he filled his canvases with writhing crowds and muscular bodies, capturing a New York of working-class pleasure and Depression-era hardship. Among his most celebrated works are Why Not Use the L? (1930, Whitney Museum of American Art), Twenty-Cent Movie (1936, Whitney Museum of American Art), and Locomotives, Jersey City (1934, Smithsonian American Art Museum).
Marsh returned to teach at the Art Students League from 1935 onward, passing on to a new generation the lessons he had absorbed from both the street and the museum. He died in Bennington, Vermont, on July 3, 1954. His paintings stand as vivid historical documents of mid-century New York, at once celebrations of urban vitality and sympathetic records of lives lived at the edges of prosperity.