James Edwin Ruthven Carpenter, Jr. (also known as J. E. R. Carpenter) (January 7, 1867 – June 11, 1932) was the leading architect of luxury residential high-rise buildings in New York City in the early 1900s. He studied at the University of Tennessee and at the Massachusetts Institute of Technology, from which he graduated in 1884. He then studied at the École des Beaux Arts in Paris.