We cite the California Universities in the Times Higher Education World Rankings for 2018. An = in the rankings mean a tie for that rank. We also list the student/staff ratio for that University. I assume staff means teaching staff.
=3. Cal Tech. 6.5
=3. Stanford U. 7.5
15. UCLA. 9.6
18. UC Berkeley 13.1
31. UC San Diego. 12.8
53. UC Santa Barbara. 28.1
=54. UC Davis. 13.8
66. USC 12.8
99. UC Irvine. 17.0
162. UC Santa Cruz. 23.0
=198. UC Riverside. 20.7