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Where am ILOCATED

Jefferson County, New York

Jefferson County, New York, has 111,540 residents (July 2025 estimate). Its county seat is Watertown. It uses Eastern Time and covers 1,268 sq mi (3,284 km²) of land.

New YorkBuffaloYonkers
Jefferson County in New York
Lewis CountyWatertownFort DrumCarthageCalcium
Jefferson County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
111,540
Land area
1,268 sq mi (3,284 km²)
County seat or government
Watertown
Time zone
Eastern TimeUTC-05:00 in January; UTC-04:00 in July
Median household income
$66,301 ± $2,730
Median home value
$188,200 ± $6,002
Median rent, with utilities
$1,213 ± $32
Homes lived in by their owners
54.7% ± 1.3 points
County type
County
Metro or micro area
Watertown-Fort Drum, NY metro areaCentral county
Water area
589 sq mi (1,525 km²)
State
New York
County code (FIPS)
36045
Coordinates (central point)
43.996389, -76.052968
Open this point in the location finder

These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Jefferson County

Time zoneLocal time and UTC offsetNext clock change
Eastern TimeAmerica/New_YorkUTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock.Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

  1. 1360136,839 people
  2. 1360314,136 people
  3. 1361910,578 people
  4. 136429,043 people
  5. 136055,259 people
  6. 136375,212 people
  7. 136244,650 people
  8. 136343,570 people
  9. 136912,990 people
  10. 136562,942 people
  11. 136122,865 people
  12. 136462,546 people
All 43
  1. 136062,468 people
  2. 136022,440 people
  3. 136852,362 people
  4. 136262,202 people
  5. 136732,097 people
  6. 136072,020 people
  7. 136611,908 people
  8. 136221,859 people
  9. 130831,835 people
  10. 136181,771 people
  11. 136081,676 people
  12. 136161,430 people
  13. 136501,236 people
  14. 136791,205 people
  15. 13682854 people
  16. 13615700 people
  17. 13665465 people
  18. 13693423 people
  19. 13659386 people
  20. 13628330 people
  21. 13640318 people
  22. 13692222 people
  23. 13643193 people
  24. 13674178 people
  25. 13638157 people
  26. 13611147 people
  27. 13651147 people
  28. 13636141 people
  29. 13632118 people
  30. 1364191 people
  31. 1367554 people

43 ZIP Code areas overlap Jefferson County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

Jefferson County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

Towns in Jefferson County, largest first

  1. Town of Le Ray25,266 people
  2. Town of Brownville5,797 people
  3. Town of Wilna5,677 people
  4. Town of Watertown5,557 people
  5. Town of Adams4,928 people
  6. Town of Clayton4,693 people
  7. Town of Champion4,530 people
  8. Town of Alexandria3,713 people
  9. Town of Ellisburg3,339 people
  10. Town of Pamelia3,304 people
  11. Town of Hounsfield3,257 people
  12. Town of Rutland3,009 people
All 22
  1. Town of Orleans2,778 people
  2. Town of Theresa2,621 people
  3. Town of Cape Vincent2,532 people
  4. Town of Lyme2,066 people
  5. Town of Antwerp1,777 people
  6. Town of Henderson1,698 people
  7. Town of Philadelphia1,557 people
  8. Town of Rodman1,466 people
  9. Town of Lorraine878 people
  10. Town of Worth222 people

People counts are American Community Survey 2020–2024 5-year estimates. All towns in New York, by county

School districts in Jefferson County, largest first

  1. Watertown City School District29,043 people
  2. Indian River Central School District24,117 people
  3. Carthage Central School District18,547 people
  4. South Jefferson Central School District10,744 people
  5. Gouverneur Central School District9,962 people
  6. General Brown Central School District8,865 people
  7. Thousand Islands Central School District6,880 people
  8. Sandy Creek Central School District5,343 people
  9. Sackets Harbor Central School District3,690 people
  10. Alexandria Central School District3,589 people
  11. La Fargeville Central School District3,332 people
  12. Belleville Henderson Central School District3,289 people
All 15
  1. Copenhagen Central School District2,965 people
  2. Lyme Central School District2,247 people
  3. Hammond Central School District2,127 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

  1. Watertown, New York (city)24,375 people
  2. Fort Drum, New York (CDP)16,065 people
  3. Carthage, New York (village)3,510 people
  4. Calcium, New York (CDP)2,935 people
  5. West Carthage, New York (village)1,864 people
  6. Clayton, New York (village)1,661 people
  7. Black River, New York (village)1,651 people
  8. Adams, New York (village)1,531 people
  9. Sackets Harbor, New York (village)1,490 people
  10. Alexandria Bay, New York (village)1,212 people
  11. Adams Center, New York (CDP)1,075 people
  12. Theresa, New York (village)945 people
All 41
  1. Great Bend, New York (CDP)938 people
  2. Pamelia Center, New York (CDP)907 people
  3. Philadelphia, New York (village)821 people
  4. Dexter, New York (village)754 people
  5. Brownville, New York (village)700 people
  6. Antwerp, New York (village)683 people
  7. Cape Vincent, New York (village)658 people
  8. Evans Mills, New York (village)653 people
  9. Chaumont, New York (village)650 people
  10. Glen Park, New York (village)624 people
  11. La Fargeville, New York (CDP)512 people
  12. Pierrepont Manor, New York (CDP)425 people
  13. Mannsville, New York (village)417 people
  14. Felts Mills, New York (CDP)402 people
  15. Redwood, New York (CDP)371 people
  16. Deferiet, New York (village)366 people
  17. Depauville, New York (CDP)310 people
  18. Thousand Island Park, New York (CDP)222 people

See all 41 cities, towns and communities in Jefferson County, largest first

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Lewis County, New York34 mi southeast
  2. Oswego County, New York38 mi south
  3. St. Lawrence County, New York59 mi northeast
  4. Cayuga County, New York73 mi south

Before using this answer on a form

Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.

Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.