The Southern CIF section is by far the largest of the current 10 within California. It spans the largest amount of territory and services about 3x the schools with 566 and leagues with 115 as compared to the next largest section, San-Joaquin.
The area covered by the section is approximately 51,376 square miles which surpasses the next largest section(Northern). The densest county with schools is by far Orange County which hosts 125 High Schools within a 791 square mile area that host about ~170k students in 2020.