John Smith (born 1826, date of death unknown) was a Union Navy sailor in the American Civil War and a recipient of the U.S. military's highest decoration, the Medal of Honor, for his actions at the Battle of Mobile Bay. Born in 1826 in Albany, New York, Smith joined the Navy from that state. By August 5, 1864, he was serving as a second captain of the top and gun captain on the USS Richmond. On that day, during the Battle of Mobile Bay, Alabama, he continued to man his gun despite heavy fire. For this action, he was awarded the Medal of Honor four months later, on December 31, 1864.