Thomas Leigh Gatch (August 9, 1891 – December 16, 1954) was an American naval officer and attorney in the 20th century. A native of Oregon, and grandson of educator Thomas Milton Gatch, he served in the United States Navy as a ship commander during World War II and Judge Advocate General of the Navy from 1943 to 1945. His last command was as commander of the Atlantic Fleet's service force.