| Ralf-Reimar Wolfram | |
| Birth Place: | Wilhelmshaven, Province of Hanover, Kingdom of Prussia, German Empire |
| Death Place: | , Norwegian Sea |
| Rank: | Korvettenkapitän |
| Commands: | U-864 |
| Battles: | |
Ralf-Reimar Wolfram (31 March 1912 – 9 February 1945) was a Korvettenkapitän (lieutenant commander) during World War II. During his career he commanded two U-boats for a total of 118 days at sea spanning four patrols. During his third patrol he sank the, an American liberty ship. Robert Gray was a straggler from convoy HX 234 en route to Britain.
For Wolfram's fourth patrol, he commanded during Operation Caesar. He was killed when U-864 was sunk by the British submarine . This was the only known instance of one submerged submarine sinking another submerged submarine. U-864 remains Wolfram's grave to this day.