The Stormlands is one of the nine constituent regions of the Seven Kingdoms. It is located on the south east coast of the continent of Westeros, on the shores of the Narrow Sea, south of the Crownlands and north of Dorne. The Stormlands are traditionally ruled from the castle of Storm's End, formerly by House Baratheon. They are so-named for the savage and frequent storms from the Narrow Sea that batter the coast. It was originally a sovereign nation known as the Storm Kingdom, until Aegon the Conqueror united Westeros under his rule. When Aegon Targaryen and his army invaded Westeros during the War of Conquest he sent his bastard half-brother Orys Baratheon to secure the Stormlands. The Storm King, Argilac the Arrogant, could have withstood siege indefinitely within Storm's End's mighty walls, but chose instead to give battle. He was defeated and killed. Storm's End surrendered and Aegon ennobled Orys, giving him Argilac's lands, castle, sigil and daughter to rule. House Baratheon continued to rule the Stormlands for the next three centuries, up to the time of Robert's Rebellion, when it became the royal family and split in three branches.

After briefly seceding from the sovereignty of the Iron Throne under Renly and then Stannis Baratheon early in the War of the Five Kings, the Stormlands presumably yielded once again following the Battle of Blackwater. Due to the legal extinction of the Baratheon line with the death of King Tommen Baratheon  and the ascent of House Lannister to the throne, the region is left leaderless and thus in an ambiguous status and a power vacuum. This power vacuum, however doesn’t last forever, for Daenerys Targaryen legitimized the late King Robert Baratheon’s son Gendry as a true Baratheon. This restores House Baratheon’s former power over the Stormlands. Bastards born in the Stormlands are given the surname Storm.

The Stormlands are located on the east coast of Westeros, relatively near the Free Cities in Essos across the Narrow Sea. They are largely separated from Dorne to the south by an inlet of the Narrow Sea known as the Sea of Dorne. In the north, Blackwater Bay separates the Stormlands from the bulk of the Crownlands, though the Crownlands actually extend south of the bay, in a small strip that includes the northern parts of the Kingswood, as well as the peninsula of Massey's Hook. To the west, the Stormlands share a long border with the Reach, which extends all the way from south of Highgarden to almost reach the capital city of King's Landing in the north. The vast watershed of the Mander River, which dominates the Reach as it flows west, does not extend into the Stormlands, indeed the watershed of the Mander is essentially what marks the border between the Reach and the Stormlands.

Notable places shown in the series are: