Dor-lómin, "Land of Echoes", was the south-western part of Hithlum, bordered in the east by the Mountains of Mithrim, and in the north by the river which formed the Rainbow Cleft known as Annon-in-Gelydh, or "Gate of the Noldor".
It was first colonized by the Noldor shortly after they arrived in Middle-earth, and for a long time was ruled by Fingon son of Fingolfin, before he took over as High King of the Noldor after his father was killed.
Húrin son of Galdor, the last Edain lord of Dor-lómin dwelt in its south-western corner, near the mountain known as Amon Darthir, where the river Nen Lalaith began. After the Nírnaeth Arnoediad, when the House of Hador was destroyed or scattered, Easterlings dwelt in Dor-lómin, and Tuor — Húrin's orphaned nephew — was fostered by the Elves of Androth in the nearby Mountains of Mithrim.
Like the rest of Hithlum Dor-lómin was destroyed during the War of Wrath.