John Calvin Curtis (April 17, 1845 – January 17, 1917) was a Lieutenant of the Ninth Regiment Connecticut Volunteer Infantry in the American Civil War, and a Medal of Honor recipient. Curtis was born on April 17, 1845 in Bridgeport, Connecticut. He enlisted in the Ninth Regiment on August 17, 1861. On August 5, 1862, as a Sergeant-Major at age 17, he became instrumental in repulsing a Confederate attack aimed at recapturing Baton Rouge, Louisiana. During heavy firing, he "voluntarily sought the line of battle and alone and unaided captured 2 prisoners, driving them before him to regimental headquarters at the point of the bayonet." For this act, Curtis received the Medal of Honor on December 16, 1896, the only soldier from the Ninth to be so honored.