| 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 | Watertown | 6/10 Average · 57th pct | 1,402 | 3 | PK–12 | 3 |
| 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 | K–12 | 7 |
| South Jefferson Central School District | Adams | 4/10 Below Average · 30th pct | 1,835 | 4 | PK–12 | 6 |
How Jefferson County compares
Together they enroll 12,767 students across 30 schools. The largest is Indian River Central School District with 3,499 students. Districts here average 6.3/10, above the New York average of 5.5/10. Ratings range from 4/10 to 9/10.
School Districts in Jefferson County, New York
Jefferson County has 10 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 (NCES EDFacts, 2021–22 for most districts), 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.