James Mifflin (born 1839, date of death unknown) was a United States Navy sailor and a recipient of America's highest military decoration—the Medal of Honor—for his actions in the American Civil War. Mifflin enlisted in the Navy from his home state of Virginia in April 1864, and by August 5, 1864 was serving as an Engineer's Cook on the USS Brooklyn (1858). During the Battle of Mobile Bay, Alabama, Mifflin stood fast and performed his ammunition supply duties despite enemy shellfire. For his conduct during this battle, he was awarded the Medal of Honor. Also the ship USS Mifflin (APA-207) was named in his honor, the ship participated in the landings at Iwo Jima and Okinawa during World War II.