Jack Alexander Horner is memorialized at Honolulu Memorial in Hawaii.
Corporal Horner was a member of Company L, 3rd Battalion, 23rd Infantry Regiment, 2nd Infantry Division. He was listed as Missing in Action while fighting the enemy in North Korea. He was presumed dead on December 31, 1953. His remains were not recovered. His name is inscribed on the Courts of the Missing at the Honolulu Memorial. He also has a memorial stone in the Shady Grove Cemetery in Dandridge, Jefferson County, TN.