Thomas John Morris (September 24, 1837 – June 6, 1912) was a United States federal judge.
Born in Baltimore, Maryland, Morris attended Pennsylvania College and received an A.B. from Harvard College in 1856 before reading law to enter the bar in 1861. He was a commissioner for the Baltimore City Government from 1856 to 1878, and was in private practice in Baltimore from 1861 to 1879.
On July 1, 1879, Morris was nominated by President Rutherford B. Hayes to a seat on the United States District Court for the District of Maryland vacated by William F. Giles. Morris was confirmed by the United States Senate on July 1, 1879, and received his commission the same day. Morris served in that capacity until his death, in 1912, in Baltimore.