Henry A. Hammel (September 20, 1840 – November 29, 1902) was a Union Army soldier in the American Civil War who received the U.S. military's highest decoration, the Medal of Honor. Hammel was born in Germany on September 20, 1840, and entered service at St. Louis, Missouri. He was awarded the Medal of Honor for extraordinary heroism, while a sergeant in Battery A, 1st Missouri Light Artillery, on April 28 and 29, 1863, on board the steamer Cheeseman at Grand Gulf, Mississippi. His Medal of Honor was issued on March 10, 1896.