Rear Admiral David Butts Harmony (September 3, 1832 – November 2, 1917) was an officer in the United States Navy. A native of Easton, Pennsylvania, he entered the Navy in 1847 and served until the early 1890s. Combat service included many notable Civil War naval actions, including the campaigns at New Orleans and Vicksburg.
Later in his career, he served as Chief of the Navy's Bureau of Yards and Docks (1885–1889) and Chairman of the Lighthouse Board (1889–1891).
Harmony attained the rank of Rear Admiral on March 26, 1889. He retired in 1893 and died in 1917. He is buried in Arlington National Cemetery.
Some of his letters from the 1870s, written while on active duty, are archived at the National Archives and Records Administration in Washington, D.C.
- Inventory of the Naval Records Collection of the Office of Naval Records and Library, in Record Group 45. Appendix N. List of Personal Letter books of U.S. Naval Officers. June 21, 2005. Naval Historical Center. Viewed April 8, 2006.