Do UC's look at your high school school rank?

Colleges and Universities A-Z University of California - GENERAL
1

Do they look at the rank you have in your current high school?

2

UC’s do not consider rank except in the context of ELC. ELC eligibility is top 9% in your HS class or the state which guarantees that if you are not accepted into your choice UC, then there will be a spot available at the default campus which is currently UC Merced.

This link explains how ELC is determined: http://admission.universityofcalifornia.edu/counselors/freshman/california-residents/local-path.html

3

Note that ELC does not use your high school’s definition of class rank. It uses a threshold GPA from the top 9% threshold of UC-recalculated GPAs from a recent past class whose academic records were submitted for ELC threshold calculation.