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  ===House Greyjoy===
  * '''''' (seasons 2–4, 6–8) portrayed by Gemma Whelan. Gemma Whelan The daughter of Balon Greyjoy and his wife Alannys Harlaw, and elder sister of Theon. She is fierce and proud, and defies traditional ironborn gender roles by commanding her own ship, the ''Black Wind''. She has earned her father's respect by commanding men, and killing men. When her brother Theon takes Winterfell, Yara tries to convince him to go back with her to the Iron Islands, but Theon refuses. Theon is betrayed by his own men and given to Ramsay Snow, lord Bolton's sadistic bastard son, who brutally tortures and eventually castrates him. Ramsay sends Theon's penis in a box to Balon, with Ramsay threatening to mutilate Theon more unless the Ironmen leave the North, whom Ramsay also threatens to flay living. Balon refuses this, but Yara intends to save her brother of her own accord, taking one ship and fifty of the best killers on the Iron islands with her. In season 4, Yara and her men attack the Dreadfort, but find that Ramsay has broken Theon so badly that he refuses to leave with her and even insists that his name is Reek. Ramsay and his men confront Yara in the dungeon and a battle ensues in which Ramsay frees the hounds and sets them on Yara, who is forced to flee the Dreadfort without Theon, telling her men that Theon is dead. In season 6, Yara contests the Kingsmoot to decide Balon's successor and appears to sway the Ironborn by declaring that she will build the world's largest fleet, but is defeated by Euron, who plans to forge an alliance with Daenerys Targaryen to conquer Westeros. Correctly suspecting that Euron will have them killed, Yara and Theon flee the Iron Islands with their loyalists and the bulk of the Iron Fleet, and head to Meereen to forge an alliance with Daenerys first. After explaining the situation, Yara pledges her forces to Daenerys in return for the Iron Islands' independence. Yara is ordered to sail to attack King's Landing. While below decks enjoying the company of Ellaria Sand, her fleet is set upon by ships under Euron's command and they are captured. Shortly before the Battle of Winterfell, Theon leads a raiding party and frees his sister. Yara sails to the Iron Isles, to retake them in the name of Daenerys, in case the Queen and her people need a fallback position after the battle. 
  * '''Euron Greyjoy''' (seasons 6–8) portrayed by Pilou Asbæk. Pilou Asbæk A brother of King Balon Greyjoy, and the uncle of Theon and Yara Greyjoy. Euron is an infamous pirate who has terrorized seas all around the world. He is cunning, ruthless, with a touch of madness. He kills Balon Greyjoy by throwing him off a rope bridge, declaring that Balon's time is past and that it is time for a new king. At the Kingsmoot he confesses to killing Balon, but convinces the Ironborn that Balon was a poor military commander and declares that he will seduce Daenerys Targaryen and give her the Iron Fleet to conquer Westeros. The Ironborn declare Euron as their king, but before Euron can put Theon and Yara to death he discovers they have fled with the best ships of the Iron Fleet. Undeterred, he orders the Ironborn to begin constructing a new fleet. He uses this fleet to attack Yara's fleet with fire. He kills two Sand Snakes and captures Yara, Ellaria Sand and Tyene Sand. He gives the Sands to Cersei and keeps Yara prisoner. When he meets Theon he taunts him over his captive sister.
  * '''Aeron Greyjoy''' (seasons 2, 6) portrayed by Michael Feast. Michael Feast A brother of King Balon Greyjoy, and an uncle of Theon and Yara Greyjoy. Aeron is a Drowned Priest in service to the Drowned God. When Theon returned to the Iron Islands, Aeron reinitiated him into the faith of the Drowned God. After Balon's death, Aeron held a Kingsmoot to determine Balon's successor. Euron Greyjoy wins the election and is baptized by Aeron.
  * '''Balon Greyjoy''' (seasons 2–3, 6) portrayed by Patrick Malahide. The Lord of the Iron Islands and the father of Theon and Yara. Balon wished to continue the conquering ways of his people, which led him to rebel against the Iron Throne 9 years prior to the start of the series. He lost, with two of his three sons killed in the war; his youngest, Theon, was taken as a ward at Winterfell as a way to keep him from attempting another rebellion. After Theon returns to the Iron Islands with an offer from King Robb Stark for an alliance against the Lannisters, Balon refuses and instead launches beach raids against the North, proclaiming himself King of the Iron islands and the North. Theon, however, is captured and brutally tortured by the sadistic Ramsay Snow, lord Bolton's bastard, who eventually castrates him. Ramsay sends Theon's penis in a box to Balon, with Ramsay threatening to mutilate Theon further unless the Ironmen retreat from the North, whom Ramsay also threatens to flay living. Balon refuses, stating that as Theon defied him by attacking Winterfell, claiming him a "fool" and "not a man anymore", to which Yara responds she intends to save her little brother of her own accord. In Season 6, he is confronted by his younger brother, Euron, who declares that Balon has ruled for too long and throws him from a rope bridge to his death.
  * '''Dagmer Cleftjaw''' (season 2) portrayed by Ralph Ineson.Ralph Ineson Dagmer is an Ironborn Raider and Theon Greyjoy's first mate on the ''Sea Bitch''. He suggests that Theon prove himself by taking Winterfell, and persuades him to commit further atrocities to shore up his rule, such as executing Ser Rodrik Cassel for defying Theon and killing two children to pass off as Bran and Rickon Stark. However, when Robb Stark sends Ramsay Snow with an offer to spare the Ironborn if they surrender Winterfell and Theon, he knocks Theon out to hand him over and fatally wounds Maester Luwin. It is revealed in the season three finale that Dagmer and the other ironborn were instead flayed alive by Ramsay Snow and his men.
  * '''Black Lorren''' (season 2) portrayed by Forbes KB. Lorren is an infamous Ironborn raider better known as "Black Lorren". He is considered among the fiercest Ironborn warriors. He is under Theon's command while taking Winterfell. He is ultimately flayed alive by Ramsay Snow, along with the other Ironborn at Winterfell.