Region C, Class 4 now comprises just 10 schools with the 2023/24-2026/27 VHSL realignment. (Updated 5/17/25)

It now comprises teams from Dulles and Catoctin Districts, all from Loudoun County. Catoctin is a new district, a split from the old Dulles District. John Champe dropped for Class 6 Cedar Run District to join the new Catoctin District. Woodgrove dropped from Class 5 Potomac District to be a Class 4 school.

CSOA provides officials for all 10 schools.