Charles Mitchell Thomas (October 1, 1846 – July 3, 1908) was a rear admiral in the United States Navy who served for 47 years.

During the conflict, Thomas was given temporary command of the receiving ship USS St. Louis stationed at League Island in Philadelphia.

[4] During the cruise of the Great White Fleet, Thomas was second-in-command behind Rear Admiral Robley D. Evans.

Beginning in February 1908, Thomas was officially made acting commander-in-chief of the fleet when Evans was transported to San Francisco for treatment.

Five days later, Thomas retired from active duty and command was transferred to Rear Admiral Charles S. Sperry for the second leg of the voyage.