📊 What this ranking measures
Rankings are based on academic achievement — the share of students scoring proficient or above on state reading and math assessments (NY State tests 2023–24), ranked against other districts in the same state — not on spending, district size, or staffing. See full methodology →
All 11 Rated Districts in Jefferson County, NY
Sorted by rating, then state percentile
| County Rank | District | District Office | Rating | State Percentile |
|---|---|---|---|---|
| #1 | La Fargeville Central School District | La Fargeville | 9/10 Excellent | 87th |
| #2 | Thousand Islands Central School District | Clayton | 9/10 Excellent | 80th |
| #3 | Sackets Harbor Central School District | Sackets Harbor | 7/10 Good | 67th |
| #4 | Lyme Central School District | Chaumont | 7/10 Good | 66th |
| #5 | Alexandria Central School District | Alexandria Bay | 7/10 Good | 63rd |
| #6 | General Brown Central School District | Dexter | 6/10 Average | 57th |
| #7 | Indian River Central School District | Philadelphia | 5/10 Average | 47th |
| #8 | Belleville Henderson Central School District | Adams | 5/10 Average | 43rd |
| #9 | Carthage Central School District | Carthage | 4/10 Below Average | 32nd |
| #10 | South Jefferson Central School District | Adams | 4/10 Below Average | 30th |
| #11 | Watertown City School District | Watertown | 2/10 Poor | 10th |
Best School Districts in Jefferson County, New York (2026)
This page lists the 11 public school districts headquartered in Jefferson County, New York that have a SchoolDistrictFinder rating, scored using NY State tests 2023–24 state assessment data. The county rank is simply their order here; the state percentile compares each district with every rated district in New York, 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 Jefferson 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 Jefferson County, New York? ▼
Among the 11 rated districts in Jefferson County, New York, the highest-rated is La Fargeville Central School District (La Fargeville), rated 9/10 (Excellent) and in the 87th percentile of New York districts on NY State tests 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 (NY State tests 2023–24), percentile-ranked against all rated districts in New York and converted to a 1–10 scale. Full methodology here.