In Tolkien's Middle-earth, Amdîr was the name of an Elf of Lórien.
Amdîr was a Sindarin Elf of Doriath, who left east into Eriador after the War of Wrath. He took over the realm of Lórinand (later Lórien) from Silvan Elves who had had no lords before, near where Oropher established a realm among the Silvan Elves of Mirkwood.
Amdîr's fate is not exactly known, but it is probable he joined Gil-galad's forces in the War of the Last Alliance of Elves and Men, and was slain. His son Amroth succeeded him as lord of Lórien.
