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Zip Code 13603 — Watertown, NY

13603 is a ZIP Code associated with Watertown, NY, located within Jefferson. The postal region supports an estimated population of 14,136 residents across Data Pending housing units, with a population density of 985.8 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (44.038260, -75.797650)

Data MetricLocal Statistic
Postal / Zip Code13603
Primary CityWatertown
State / ProvinceNY
CountyJefferson
Total Population14,136
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density985.8 people/sq mi
TimezoneAmerica/New_York

How 13603 Compares

MetricZIP 13603Jefferson CountyNY State Average
Population14,136115,97219,771,902
Median IncomeData PendingN/AN/A
Population Density985.8 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 13602Fort Drum2.1 mi2,440N/A
Zip 13638Felts Mills2.5 mi157N/A
Zip 13616Calcium3.2 mi1,430N/A
Zip 13612Black River3.9 mi2,865N/A
Zip 13643Great Bend4.0 mi193N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →