George Macculloch Miller , was a lawyer and secretary of Cathedral of St. John the Divine.
Born in Morristown, New Jersey, he was the son of politician Jacob W. Miller and his wife Mary Louisa Macculloch.
Miller and J. Pierpont Morgan were directors of the New-York, New-Haven and Hartford Railroad. The goal of this organization was to have a second collection in churches across the United States and have the money disbursed to hospitals for assistance to indigents. This developed into a larger organization eventually becoming the United Hospital Fund.
George Macculloch Miller and several others began a series of charitable collections among churches and business groups in as early as 1882.In 1893, a committee was appointed "to take steps to have Hospital Saturday and Sunday observed throughout the United States." Members of the committee included Miller, Charles Lanier, Morris K.Jesup, Samuel D. Babcock, Cornelius Vanderbilt, Jesse Seligman, Jacob H. Schiff, and Charles Stewart Smith.