According to most charts, numerous Universities in California are generally high ranking (the UC system, USC, Pepperdine, Stanford among them) but within numerous specialties it's indisputable: UCSD for biotech, UC Davis for Ag-tech/veterinary science, Berkeley/Stanford for CS, Boalt/Hastings/King for Law, etc. The specialization matters here significantly.

The US weirdly in general has a lot of high ranking universities, but its elementary and secondary schools are very very uneven, at any level.