James Terrance Mullen (August 30, 1843 – July 6, 1891) was the first Supreme Knight of the Knights of Columbus from February 2, 1882 to May 17, 1886. He also served in the New Haven, Connecticut police and Fire Departments, and as an alderman. With his service in the Union Army and in several fraternal orders, he has been described as "veteran of fraternity."