James Brown Lord (26 April 1859 — 1 June 1902) was an American architect, working in a Beaux-Arts idiom, with a practice in New York City. His Appellate Court House was his most prominent commission, noted at the time of his premature death, at the age of forty-three. He designed one of the first of the Carnegie libraries, the Yorkville Branch of the New York Public Library, at 222 East 79th Street (illustration).