Summary:
South Monterey County Joint Union High includes four high schools in South Monterey County, all serving grades 9–12. Across the three schools with reported 2025–2026 results, average math proficiency was 9%, compared with 38% statewide; the 29-point gap is the clearest academic concern. The group’s math average was 12% the previous year, so the latest results show no improvement.
King City High leads the reported 2025–2026 results, while Portola-Butler Continuation High is at the bottom in all three subjects. King City scored 58% in English language arts (ELA), 16% in math and 24% in science; its ELA result was 8 points above the state, while math and science were 23 and 12 points below. Portola-Butler scored 17% in ELA, 0% in math and 11% in science—32, 38 and 25 points below state results, respectively. King City also reports 96% graduation, 4% dropout and 12% chronic absenteeism. By contrast, Pinnacle Coastal Valley High reports 75% graduation, 25% dropout and 74% chronic absenteeism.
Across Greenfield, King City and Portola-Butler, average ELA proficiency fell from 45% to 40% between 2024–2025 and 2025–2026, while science slipped from 21% to 19%; their gaps from state results widened in both subjects. ELA remains the group’s closest subject to the state, but the latest average was still 9 points lower. SchoolDigger’s statewide percentile ranking also fell for King City, from 58 to 46, and for Greenfield High, from 39 to 32. School sizes and reported measures differ: Greenfield enrolls 1,274 students and has a 24.8 student-teacher ratio, compared with Portola-Butler’s 115 students and 16.2 ratio. For 2024–2025, free/reduced lunch eligible figures were 79% at Greenfield, 82% at King City, 83% at Portola-Butler and 86% at Pinnacle; these figures are context, not an explanation for results. Pinnacle’s 2025–2026 proficiency scores are state-suppressed, so they cannot be compared with the other schools’ latest results.
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