The Crownlands is one of the nine constituent regions of the continent of Westeros. It was never a sovereign nation, instead it was an area contested between The Riverlands, The Stormlands and other regions until Aegon the Conqueror seized control of the area during his invasion and made it his primary foothold on the continent.
The Crownlands are ruled directly by the crown on the Iron Throne. These lands include King’s Landing and the surrounding areas, including the town of Rosby, the Kingswood, Crackclaw Point, Massey’s Hook, Dragonstone and other islands in Blackwater Bay.
Bastards in The Crownlands are given the surname Waters.