3 ms·Can California sign treaties with other countries?by jeremyjh 4y agoCan California sign treaties with other countries?n8cpdx 4y agoYes, with Congressional consent. https://en.m.wikipedia.org/wiki/List_of_interstate_compacts https://en.m.wikipedia.org/wiki/List_of_interstate_compactsjeremyjh 4y agoIf you look in that article, there has never been a compact approved between a state and a foreign government.