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County ProfileNY

Jefferson County

Population: 116,721 · 40 ZIP codes

Demographics

Source: U.S. Census Bureau (ACS/Decennial). Estimates vary by year.

People
Total population
116,721
People
Median age
33.7
Housing
Total households
47,606
Income
Median household income
$66,301
Housing
Total housing units
61,862
Employment
Employment rate
50.5%
Education
Bachelor’s degree or higher
26.5%
Healthcare
Insured population
94.5%
County details
Local time 03:18:14(ET)
NameJefferson
Total ZIP codes40total
ZIP codes (by type)
30 Standard10 PO Box
Area code315, 680
TimezoneEastern Time (ET)
Coordinates43.996389, -76.0529678
Land area1,267.9 sq miles(3,283.9 km²)

Map of Jefferson county, New York with ZIP codes

Map of Jefferson County, New York and ZIP codes

Cities and Communities in Jefferson County

Compare the largest cities in Jefferson County by population, median income, and growth. Use the table below to analyze key demographic shifts across the region.

CityPopulation
Median incomeHousehold
ZIP codes
Watertown24,685$51,7532ZIPs
Fort Drum15,896$62,2911ZIPs
Calcium3,573$57,6681ZIPs
Carthage3,236$58,1251ZIPs
Clayton1,705$60,5731ZIPs
Adams1,633$64,4321ZIPs
Adams Center1,492$87,7271ZIPs
Sackets Harbor1,351$77,0431ZIPs
Black River1,232$86,6451ZIPs
Philadelphia1,098$69,7321ZIPs
Dexter1,004$49,4081ZIPs
Brownville930$101,5631ZIPs
Alexandria Bay924$55,0481ZIPs
Great Bend807—1ZIPs
Theresa752$58,5831ZIPs
Cape Vincent699$62,0541ZIPs
Evans Mills678$71,2501ZIPs
Chaumont615$76,1251ZIPs
La Fargeville537$61,2501ZIPs
Antwerp506$56,9642ZIPs
Redwood493$109,6431ZIPs
Depauville488—1ZIPs
Felts Mills473$51,6671ZIPs
Wellesley Island348—1ZIPs
Mannsville297$83,1251ZIPs
Natural Bridge296$50,8701ZIPs
Deferiet245$66,8751ZIPs
Belleville233$70,2781ZIPs
Henderson233$61,7711ZIPs
Pierrepont Manor212$83,3241ZIPs
Three Mile Bay187$34,4641ZIPs
Ellisburg186$85,6251ZIPs
Rodman152$57,1881ZIPs
Lorraine139—1ZIPs
Plessis126$155,0531ZIPs
Fishers Landing119$61,4581ZIPs
Thousand Island Park96$190,2501ZIPs
Henderson Harbor95—1ZIPs

— Data unavailable or suppressed by the U.S. Census Bureau for areas with small sample sizes to protect individual privacy.

ZIP Codes in Jefferson County

Review the most populated postal areas across Jefferson County. Use the ranking below to compare resident density and demographic scales between the county's major zones.

ZIPCity
Median incomeHousehold
Population (ZIP)
13601Watertown$58,79137,287
13603Watertown$62,50011,808
13619Carthage$63,12010,600
13637Evans Mills$57,1034,980
13624Clayton$87,9884,967
13602Fort Drum—4,951
13605Adams$70,0454,517
13634Dexter$92,1093,999
13691Theresa$79,9432,981
13656La Fargeville$72,5002,901
13612Black River$85,6582,673
13606Adams Center$88,9772,606
13673Philadelphia$81,1672,503
13685Sackets Harbor$79,4692,224
13622Chaumont$81,0652,182
13679Redwood$101,9321,791
13618Cape Vincent$61,4941,765
13616Calcium$45,9621,714
13661Mannsville$82,2971,667
13607Alexandria Bay$66,5001,610

Data Sources & Citations

The geographic and demographic information presented on this site is compiled from publicly available, authoritative sources, including:

  • United States Census BureauDemographic, population, housing, and socioeconomic data sourced from Census Bureau datasets, including the Decennial Census and the American Community Survey (ACS).Census Data
  • United States Postal Service (USPS)ZIP code classifications, delivery types, and postal designations used for reference purposes. USPS ZIP codes are intended for mail delivery and may not always align exactly with Census geographic boundaries.USPS