Harry Theophilus Toulmin (March 4, 1838 – November 12, 1916) was a United States federal judge.
Born in Mobile County, Alabama, Toulmin read law to enter the bar in 1860. He was in private practice in Mobile, Alabama in 1860. He was a Confederate Army Colonel from 1861 to 1865. Private practice, Mobile, Alabama, -1886. He was a Member, Alabama State Assembly from 1870 to 1872. He was a judge on the 6th Judicial Circuit of Alabama from 1874 to 1880. Judge, 1st Judicial Circuit of Alabama, 1880-1882 (the result of a realignment of the circuits).
Toulmin was a federal judge on the United States District Court for the Southern District of Alabama. Toulmin was nominated by President Grover Cleveland on December 13, 1886, to a new seat created by 24 Stat. 213, 214. He was confirmed by the United States Senate on January 13, 1887, and received his commission the same day. Toulmin served in that capacity until November 12, 1916, due to his death.
He died in Toulminville, Alabama.