California, the most populous state in the United States and third largest in area after Alaska and Texas, has been the subject of more than 220 proposals to divide it into multiple states since its admission to the Union in 1850,[1] including at least 27 significant proposals prior to the 21st century.[2]
In addition, there have been some calls for the secession of multiple states or large regions in the American West (such as the proposal of Cascadia) which often include parts of Northern California.[3]