Thomas Bell Monroe (October 7, 1791 – December 24, 1865) was the 15th Secretary of State of Kentucky and a United States district judge of the United States District Court for the District of Kentucky.

Born on October 7, 1791, in Albemarle County, Virginia, Monroe attended Transylvania University and read law in 1821. He was a member of the Kentucky House of Representatives in 1816. He entered private practice in Frankfort, Kentucky starting in 1821. He was the 15th Secretary of State of Kentucky from 1823 to 1824. He was reporter for the Kentucky Court of Appeals starting in 1825. He was the United States Attorney for the District of Kentucky from 1830 to 1834.^[1]

Monroe was nominated by President Andrew Jackson on February 20, 1834, to a seat on the United States District Court for the District of Kentucky vacated by Judge John Boyle. He was confirmed by the United States Senate on March 6, 1834, and received his commission on March 8, 1834. His service terminated on September 18, 1861, due to his resignation.^[1]

Following his resignation from the federal bench, Monroe was a delegate from Kentucky to the Provisional Congress of the Confederate States from 1861 to 1862. He resumed private practice in Richmond, Virginia in 1862. He died on December 24, 1865, in Pass Christian, Mississippi.^[1]