Best High Schools in Fillmore, CA

Fillmore has two high schools, both serving grades 9–12: Fillmore Senior High enrolls 1,007 students and Sierra High enrolls 64. In 2025–26, Fillmore Senior was near the state average in all-grades English language arts (ELA), with 50% proficient versus 49% statewide, but both schools were far below state results in math and below them in science. The most important finding is that Fillmore Senior led Sierra in every reported subject, while math proficiency was low at both schools.

Fillmore Senior stands out as the stronger school in the reported results: its proficiency was 50% in ELA, 6% in math and 20% in science, compared with 8%, 3% and 5% at Sierra High. The school-to-school gaps were 43 percentage points in ELA, 4 in math and 15 in science. Graduation and attendance measures also favored Fillmore Senior: graduation was 99% versus 89%, dropout was under 1% versus 9%, and chronic absenteeism was 16% versus 51%. SchoolDigger ranked Fillmore Senior 1,428th of 2,137 California schools, in the 33rd percentile with 2 stars; Sierra ranked 2,012th, in the 6th percentile with 0 stars.

Scores declined in most subjects from 2024–25 to 2025–26, while state results rose in all three. Fillmore Senior fell 3 percentage points in ELA, 7 in math and 3 in science; Sierra fell 3 in ELA and math but gained 2 in science. Sierra’s smaller size and lower student-teacher ratio—12.8 students per teacher, versus 21.5 at Fillmore Senior—did not coincide with higher scores in this comparison. Sierra also reported higher 2024–25 per-student spending ($39,052 versus $29,594). Both schools reported free/reduced lunch eligible figures for 2024–25: 71% at Fillmore Senior and 84% at Sierra. These are descriptive differences, not explanations for the results.