The State of Jefferson
https://ancestralfindings.com/the-ghost-state-of-jefferson-all-you-need-to-know-about-the-state-you-didnt-know-about/"
Yup. Their movement to create a 51st state has been around a lot longer.
Official site: http://soj51.org/
The California counties involved:
Their Press releases, White papers and even a radio program: Media
The State of Jefferson was actually the original idea of the mayor of Port Orford Oregon in 1941.