📊 What this ranking measures
Rankings are based on academic achievement — the share of students scoring proficient or above on state reading and math assessments (CAASPP 2023–24), ranked against other districts in the same state — not on spending, district size, or staffing. See full methodology →
All 5 Rated Districts in Colusa County, CA
Sorted by rating, then state percentile
| County Rank | District | District Office | Rating | State Percentile |
|---|---|---|---|---|
| #1 | Pierce Joint Unified School District | Arbuckle | 5/10 Average | 43rd |
| #2 | Maxwell Unified School District | Maxwell | 4/10 Below Average | 37th |
| #3 | Colusa Unified School District | Colusa | 4/10 Below Average | 32nd |
| #4 | Princeton Joint Unified School District | Princeton | 2/10 Poor | 19th |
| #5 | Williams Unified School District | Williams | 2/10 Poor | 14th |
Best School Districts in Colusa County, California (2026)
This page lists the 5 public school districts headquartered in Colusa County, California that have a SchoolDistrictFinder rating, scored using CAASPP 2023–24 state assessment data. The county rank is simply their order here; the state percentile compares each district with every rated district in California, which is how the 1–10 rating is set. Ratings are not comparable with districts in other states.
Districts are placed in the county of their NCES directory listing. A district's boundaries can cross county lines, and a home in Colusa County may be served by a district headquartered next door — search your address or zip code to confirm.
Frequently Asked Questions
What is the best-rated school district in Colusa County, California? ▼
Among the 5 rated districts in Colusa County, California, the highest-rated is Pierce Joint Unified School District (Arbuckle), rated 5/10 (Average) and in the 43rd percentile of California districts on CAASPP 2023–24 reading and math proficiency.
How are these rankings calculated? ▼
Each district's rating comes from the share of its students scoring proficient or above on state reading and math assessments (CAASPP 2023–24), percentile-ranked against all rated districts in California and converted to a 1–10 scale. Full methodology here.