Turgon was the son of Fingolfin and Anairë. By his wife Elenwë he was the father of Idril.
Turgon was born in Valinor. With many of the Noldor, he followed his half-uncle Fëanor to Middle-Earth to reclaim the Silmarils and battle their thief Morgoth, who had also killed Fëanor and Fingolfin's father Finwë, First High King of the Noldor. Elenwë died in the crossing, however. Turgon's father Fingolfin later became High King of the Noldor. After his death battling Morgoth his oldest son Fingon became King, however when they were killed by Gothmog, Lord of Balrogs, the position passed to Turgon. On the instructions of the Valar of the Waters Ulmo, Turgon found a secret place in the mountains of the North. His people built the city of Gondolin and Turgon became its King. His daughter Idril married the human hero Tuor and their son was Eärendil. However, Turgon's sister-son Maeglin secretly desired Idril, though first cousin relationships were not allowed among the Elves. He betrayed Gondolin to Morgoth, who destroyed the city. Turgon died in the destruction of the city. However, his daughter, son-in-law and grandson were among those who escaped.