Franklin Guest Smith [freɪŋklɪn gɛst smɪθ] (February 16, 1840 – October 7, 1912) was a career officer in the United States Army.

A native of Blossburg, Pennsylvania, Smith studied civil engineering at Rensselaer Polytechnic Institute, from which he graduated in 1859.

He was the longtime commander of Battery F, 4th Artillery, and in the 1890s began a long tenure as secretary and member of the Chickamauga and Chattanooga National Military Park Commission.

[4] When McClellan was commissioned a major general in the Union Army at the start of the American Civil War, Smith continued to serve as his secretary.

[4] He continued to serve with the 4th Artillery, primarily as commander of Battery I during the regiment's assignment to the Army of the Cumberland, and took part in the fight at Snodgrass Hill during the Battle of Chickamauga.

[7][8] During the war, Smith received brevet promotions to captain (December 31, 1862) and major (September 20, 1863) as commendations for his superior service.

[10] On August 3, 1903, he was promoted to brigadier general as the result of a federal law permitting still-serving Civil War veterans to be advanced one grade prior to retiring.

[13] In 1921, the U.S. Army constructed Battery Smith, one of several coastal artillery positions on the island of Corregidor in Manila Bay, Philippines.

[1] With his first wife, Smith was the father of four children: Mary Jessie; Frances Maria; Margaret; and Charles Franklin.

[4] His first cousin Thomas Guilford Smith was a prominent engineer and corporate executive who was associated with the steel businesses of Andrew Carnegie.