Truman Dudley Allen (1829-1924), commonly known as T. D. Allen or T. Dudley Allen, was an American architect.
He worked also as part of Healy and Allen.
A number of his works are listed on the U.S. National Register of Historic Places.
Works include (with attribution):
Columbus City Hall, 105 N. Dickason St. Columbus, Wisconsin (Allen, T. D.), NRHP-listed
Franklin County Courthouse, Central Ave. and 1st St., NW Hampton, Iowa (Allen, T. D.), NRHP-listed The courthouse is also included in the NRHP-listed Hampton Double Square Historic District.
Hardin County Courthouse, Edgington Ave. Eldora, Iowa (Allen, T. D.), NRHP-listed The courthouse is included in the Eldora Downtown Historic District.
Medina County Courthouse, Liberty St. and Broadway, Public Sq. Medina, Ohio (Allen, T. Dudley), NRHP-listed
Merrill City Hall, 717 E. 2nd St. Merrill, Wisconsin (Allen, T. D.), NRHP-listed
Rock County Courthouse and Jail, 204 E. Brown Luverne, Minnesota (Allen, T. D.), NRHP-listed
