Lycians (Greek: Λύκιοι, romanized: Lúkioi) is the name of various peoples who lived, at different times, in Lycia, a geopolitical area in Anatolia (also known as Asia Minor).

The Greek historian Herodotus wrote about them:

The Lykians however have sprung originally from Crete (for in old time the whole of Crete was possessed by Barbarians). When the sons of Europa, Sarpedon and Minos, came to be at variance in Crete about the kingdom, Minos having got the better in the strife of parties drove out both Sarpedon himself and those of his party. Those expelled came to the land of Milyas in Asia, for the land which now the Lykians inhabit was anciently called Milyas, and the Milyans were then called Solymoi. Now while Sarpedon reigned over them, they were called by the name which they had when they came thither, and by which the Lykians are even now called by the neighbouring tribes, namely Termilai; but when from Athens Lycos the son of Pandion came to the land of the Termilai and to Sarpedon, he too having been driven out by his brother namely Aigeus, then by the name taken from Lycos they were called after a time Lykians. The customs which these have are partly Cretan and partly Carian; but one custom they have which is peculiar to them, and in which they agree with no other people, that is they call themselves by their mothers and not by their father; and if one asks his neighbour who he is, he will state his parentage on the mother's side and enumerate his mother's female ascendants. If a woman who is a citizen marry a slave, the children are accounted to be of gentle birth; but if a man who is a citizen, though he were the first man among them, have a slave for wife or concubine, the children are without civil rights.

— Herodotus, Histories, I.173.

The earliest known inhabitants of the area were the Solymoi (or Solymi), also known as the Solymians. Later in prehistory, another people, known as the Milyae (or Milyans) migrated to the same area; they spoke an Anatolian language (Indo-European) known as Milyan and the area was known as Milyas.

According to Herodotus, Milyas was subsequently settled by a people originating in Crete, whose endonym was trm̃mili – the hellenized form of this name was Termilae (Τερμίλαι). Under a leader named Sarpedon, the Termilae had been driven out of Crete (according to Herodotus) by Minos and settled in a large part of Milyas. Subsequently, the Milyae were concentrated increasingly in the adjoining mountains, whereas the Termilae remained a maritime people. The area occupied by the Termilae gradually became known to them as trm̃mis.

Greek sources referred to trm̃mis as Lykia (Latin: Lycia). The reason for this, according to Greek mythology, was that an Athenian aristocrat named Lykos (Lycus) and his followers settled in trm̃mis, after being exiled from Athens. The land was known to the Greeks as Lukia (later Lykia; Latin Lycia) and its inhabitants were referred to as Lukiae (later Lykiae; Latin Lyciani). However, trm̃mili remained their endonym.

From the 5th or 4th centuries BCE, Lycia came under increasing Greek social and political influences. The Lycian language became extinct and was replaced by Ancient Greek, some time around 200 BCE.