The public-private divergence: California's high schools are shrinking — except the ones that aren't

The finding, in plain English

Public and private high schools are moving in opposite directions. From 2020 to 2025, enrollment at California's public high schools fell 1.7% (2,357,346 → 2,318,191 students), while private high-school enrollment grew 4.3% (156,702 → 163,430).

Shrinking is now the majority experience for public schools. 60% of the state's public high schools lost enrollment over that window (vs. 30% that grew); among private high schools the pattern flips — 47% grew, 40% shrank.

The senior-class peak is behind us. California's public-school senior class peaked at 474,464 in 2024 and stands at 453,460 in 2026 — a drop of 21,004 seniors (4.4%) in 2 years. The demographic decline that has emptied elementary classrooms for a decade has now reached 12th grade.

Four takeaways

1. This is a public-school story, not a California-kids story. The private sector grew 4.3% through the same window in which publics shed 39,155 students — families aren't just leaving the state; some are leaving the sector.
2. Money follows the students. California funds districts per pupil, so every school on the shrinking side of this divergence is also on the shrinking side of its budget — the mechanism behind the consolidation and school-closure fights now surfacing across the state.
3. The decline has reached 12th grade. Senior classes lag birth cohorts by 17-18 years, so the enrollment cliff that hit elementary schools in the 2010s is now arriving at graduation — with knock-on effects for college applications from the state that sends the UC system most of its students.
4. Even in decline, there are fast growers. 30% of public high schools grew — the interesting question for any community is which side of the line its school is on, and why.

Look up any school yourself

This brief distills our interactive enrollment explorer — the same data, searchable by school and filterable by county, with each school's year-by-year trend, the local risers and fallers around it, and a plain-English read on what's driving each move.

Method & sources: California Department of Education school-level enrollment files. Sector totals compare 2020 to 2025, the window with consistent coverage of both sectors (CDE's private-school enrollment file broadened in 2020; earlier years cover too few private schools to compare honestly — one reason sector comparisons elsewhere can mislead). Senior-class series is public schools only, through 2026 (private reporting lags a cycle). "Growing"/"shrinking" uses a ±2% threshold; the winners/losers lists exclude very small and virtual schools, whose swings are noise. See the full methodology.