The Grey Havens, known also as Mithlond, was an Elvish port city located on the Gulf of Lune in the Elven realm of Lindon in Middle-earth.
After the tumult of the War of Wrath, Mithlond was the primary Elven settlement west of the Misty Mountains prior to the establishment of Eregion and Rivendell. Even after the death of Gil-galad and as the Elves dwindled in numbers yearly in the Third Age, the Grey Havens remained a major coastal town, and the sanctioned departure point of Elven ships to the Undying Lands and Aman.
Despite being a major port, by the late Third Age, the Grey Havens had sparse population, like Rivendell and northeastern Mirkwood