| District | City | Rating | Students | Schools | Grades | Zip Codes |
|---|---|---|---|---|---|---|
| La Fargeville Central School District | Wellesley Island | 9/10 Excellent · 87th pct | 503 | 1 | PK–12 | 3 |
| Thousand Islands Central School District | Cape Vincent | 9/10 Excellent · 80th pct | 891 | 4 | PK–12 | 4 |
| Sackets Harbor Central School District | Sackets Harbor | 7/10 Good · 67th pct | 415 | 1 | PK–12 | 1 |
| Lyme Central School District | Chaumont | 7/10 Good · 66th pct | 344 | 1 | PK–12 | 2 |
| Alexandria Central School District | Alexandria Bay | 7/10 Good · 63rd pct | 459 | 2 | PK–12 | 3 |
| General Brown Central School District | Brownville | 6/10 Average · 57th pct | 1,402 | 3 | PK–12 | 2 |
| Indian River Central School District | Fort Drum | 5/10 Average · 47th pct | 3,499 | 8 | PK–12 | 6 |
| Belleville Henderson Central School District | Belleville | 5/10 Average · 43rd pct | 510 | 1 | PK–12 | 4 |
| Carthage Central School District | Watertown | 4/10 Below Average · 32nd pct | 2,909 | 5 | PK–12 | 7 |
| South Jefferson Central School District | Adams | 4/10 Below Average · 30th pct | 1,835 | 4 | PK–12 | 6 |
| Watertown City School District | Watertown | 2/10 Poor · 10th pct | 3,936 | 8 | PK–12 | 1 |
How Jefferson County compares
Together they enroll 16,703 students across 38 schools. The largest is Watertown City School District with 3,936 students. Districts here average 5.9/10, above the New York average of 5.4/10. Ratings range from 2/10 to 9/10.
School Districts in Jefferson County, New York
Jefferson County has 11 public school districts covering 39 zip codes. The top-rated district in Jefferson County is La Fargeville Central School District (9/10). Ratings are based on the share of students proficient in reading and math on state assessments (NY State tests 2023–24), ranked against all districts in New York. Directory details come from NCES CCD 2024–25.
Enter your zip code on any page to confirm your exact district assignment — district boundaries are address-specific and may not follow county or city lines.
Frequently Asked Questions
How many school districts are in Jefferson County, NY?
11 school districts serve zip codes in Jefferson County, NY. This page lists each one with its rating, enrollment, grade span and the zip codes it covers.
What is the best-rated school district in Jefferson County, NY?
Of the districts serving Jefferson County, La Fargeville Central School District has the highest rating on this site at 9/10. That places it in the 87th percentile among New York school districts.
How are these school district ratings calculated?
Each rating is the share of students scoring proficient or above on New York reading and math assessments, ranked against other districts in New York and converted to a 1–10 scale. Percentiles compare districts within New York only, never across state lines.