George Thomas Summerlin (November 11, 1872 – July 1, 1947) was an American army officer and diplomat from Louisiana.

He graduated from the latter in 1896, and was chosen aide-de-camp to General Theodore Schwan at the outbreak of the Spanish–American War.

After rising through the ranks and serving in Japan, China, Mexico and Italy, he was appointed Minister to Honduras in 1924.

[1][2] In 1937, President Roosevelt appointed Summerlin Chief of Protocol of the United States.

Summerlin was married in 1899 to Virginia Loomis, a granddaughter of Jacob Jay Vandergrift.