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Zip Code 13603 — Watertown, NY

ZIP Code 13603 is associated with Watertown, NY, in Jefferson County. The listed population estimate is 14,136; estimated density is 985.8 people per square mile. Among records with population estimates, it ranks #2 of 38 in Jefferson County and #420 of 1,778 in NY.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (44.038260, -75.797650)

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

How 13603 Compares

MetricZIP 13603Jefferson County recordsNY records
Population estimate14,136115,972 (sum)19,771,902 (sum)
Population Density985.8 /sq mi----
County population rank#2 of 38----
State population rank#420 of 1,778----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in NY

ZIP CodeCityDistancePopulation estimate
ZIP 13602Fort Drum2.1 mi2,440
ZIP 13638Felts Mills2.5 mi157
ZIP 13616Calcium3.2 mi1,430
ZIP 13612Black River3.9 mi2,865
ZIP 13643Great Bend4.0 mi193

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 →