Rialto High School 2,711 Students Enrolled 9-12 Grades Supported 2020-21 BARR Beginning Follow Rialto High School 5 Mar 1367645648133054465Sign up for Summer School now before it is too late. Spots are filling up fast. #RialtoASB #Rialtousd #RialtoHS Rialto High School 595 S. Eucalyptus Avenue, Rialto, CA 92376-7207 Website