13603 ZIP Code — Watertown, NY
Jefferson County, New York
ZIP code 13603 is located in Watertown, New York, within Jefferson County. It covers approximately 5.54 square miles and serves a population of 14,050 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 315/680.
About ZIP code 13603
The housing stock consists of a mix of housing types. Most homes were built in the 2000s, giving the area an established character. Renters make up the majority at 97%, typical of denser urban areas.
Median household income is $56,853.
The dominant occupation class is sales and office, with retail trade as the leading industry. The average commute of 12 minutes is near the national average.
Educational attainment is near the national average, with 32% of residents holding a bachelor's degree or higher.
Notable community characteristics include a notable veteran presence at 18% of civilians, above the national average of 7%.
14,050
population
5.54
sq mi land
Standard
ZIP type
Eastern (ET)
timezone
13603 ZIP code map
Cities in ZIP code 13603
Below are the cities the US Postal Service accepts for ZIP code 13603. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Watertown | Acceptable |
| Watertown | Preferred |
Nearby ZIP codes
13638 Felts Mills (1.7 mi)
13612 Black River (3.9 mi)
13616 Calcium (4 mi)
13637 Evans Mills (4.5 mi)
13601 Watertown (7.6 mi)
13602 Fort Drum (9.4 mi)
13673 Philadelphia (9.7 mi)
13619 Carthage (11.5 mi)
13691 Theresa (12.2 mi)
13665 Natural Bridge (13.7 mi)
13656 La Fargeville (14 mi)
13682 Rodman (14.5 mi)
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 14,050 |
| Population density | 2,536 / sq mi |
| State FIPS | 36 |
| County FIPS | 045 |
| Geography | |
|---|---|
| Land area | 5.54 sq mi |
| Water area | 0.03 sq mi |
| Latitude | 44.0419 |
| Longitude | -75.7716 |
| Timezone | Eastern (ET) |
| Area code | 315/680 |
Total population by age
Gender
Race & ethnicity
Economics
updated 05/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 49.1% | 45.1% | 37.0% |
| $50k – $100k | 42.0% | 34.1% | 27.0% |
| $100k – $200k | 8.2% | 18.0% | 24.4% |
| Over $200k | 0.7% | 2.7% | 11.5% |
Demographics & statistics
14,050
Population
2,536
People per sq mi
22.5
Median age
$56,853
Median household income
$21,278
Per capita income
$0
Median home value
$1,475
Median monthly rent
2.7%
Home ownership
8.5%
Poverty rate
10.1%
Unemployment
378
Housing units
31.8%
Bachelor's or higher
Age distribution
Male
Female
1,474
Under 5
1,260
1,022
5–9
873
373
10–14
319
273
15–19
234
1,150
20–24
983
2,183
25–34
1,866
851
35–44
727
203
45–54
174
17
55–59
14
11
60–64
10
18
65–74
15
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 5,601 | 39.9% |
| 18 and over | 8,449 | 60.1% |
| 65 and over | 33 | 0.2% |
| Median age | 22.5 years | |
Race & ethnicity
White
66.9%
Black or African American
10.5%
Two or more races
8.3%
Hispanic or Latino
6.7%
Other race
3.9%
Asian
2%
Native Hawaiian / Pacific Islander
0.8%
American Indian / Alaska Native
0.7%
| Group | Count | % |
|---|---|---|
| White | 10,075 | 66.9% |
| Black or African American | 1,589 | 10.5% |
| Two or more races | 1,253 | 8.3% |
| Hispanic or Latino | 1,016 | 6.7% |
| Other race | 592 | 3.9% |
| Asian | 301 | 2% |
| Native Hawaiian / Pacific Islander | 128 | 0.8% |
| American Indian / Alaska Native | 112 | 0.7% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 49.1% | 45.1% | 37.0% |
| $50k – $100k | 42.0% | 34.1% | 27.0% |
| $100k – $200k | 8.2% | 18.0% | 24.4% |
| Over $200k | 0.7% | 2.7% | 11.5% |
Under $10k
3.9%
$10k–$15k
1.8%
$15k–$25k
6.1%
$25k–$35k
9.1%
$35k–$50k
23.6%
$50k–$75k
21.9%
$75k–$100k
16.6%
$100k–$150k
13.0%
$150k–$200k
3.5%
$200k+
0.5%
| Range | % of households |
|---|---|
| Under $10k | 3.9% |
| $10k–$15k | 1.8% |
| $15k–$25k | 6.1% |
| $25k–$35k | 9.1% |
| $35k–$50k | 23.6% |
| $50k–$75k | 21.9% |
| $75k–$100k | 16.6% |
| $100k–$150k | 13.0% |
| $150k–$200k | 3.5% |
| $200k+ | 0.5% |
| Median income | $56,853 |
Housing
Home values
$50k–$100k
40.2%
$300k–$500k
59.8%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $0 |
| Median rent / month | $1,475 |
| Owner occupied | 2.7% |
| Renter occupied | 97.3% |
| Vacant | 5.1% |
| Single-family detached | 13.2% |
| Large apartment buildings | 5.7% |
| Mobile homes | 0.0% |
| Median rooms | 5.3 |
| Avg household size (owned) | 1.82 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.0% |
| 2010–2019 | 27.1% |
| 2000–2009 | 29.6% |
| 1990–1999 | 21.3% |
| 1980–1989 | 6.5% |
| 1970–1979 | 3.7% |
| 1960–1969 | 3.3% |
| 1950–1959 | 1.9% |
| 1940–1949 | 0.4% |
| 1939 or earlier | 6.0% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 1.0% |
| 1 bedroom | 5.9% |
| 2 bedrooms | 41.7% |
| 3 bedrooms | 33.7% |
| 4 bedrooms | 15.1% |
| 5+ bedrooms | 2.6% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 6.4% |
| 1 vehicle | 29.8% |
| 2 vehicles | 58.8% |
| 3 or more | 5.0% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 47.0% |
| Electricity | 46.9% |
| Propane / LP gas | 3.6% |
| Wood | 0.3% |
| No fuel used | 1.1% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 3,706 | 80.1% |
| Cohabiting couple | 32 | 0.7% |
| Male householder, no spouse | 551 | 11.9% |
| Female householder, no spouse | 337 | 7.3% |
| Households with children under 18 | 2,636 | 57.0% |
| Households with seniors (65+) | 51 | 1.1% |
| Average household size | 3.03 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 13.0% | 9.7% |
| Married | 86.1% | 87.4% |
| Separated | 0.0% | 0.8% |
| Widowed | 0.0% | 0.0% |
| Divorced | 0.9% | 2.0% |
Education
Less than 9th grade
1.0%
Some HS, no diploma
0.7%
HS graduate
15.7%
Some college, no degree
37.9%
Associate's degree
13.0%
Bachelor's degree
26.1%
Graduate / professional
5.7%
| Metric | % |
|---|---|
| HS diploma or higher | 98.4% |
| Bachelor's or higher | 31.8% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 431 | 9.6% |
| Kindergarten | 397 | 8.9% |
| Elementary school | 1,937 | 43.3% |
| High school | 410 | 9.2% |
| College / grad school | 1,296 | 29.0% |
Employment
Industry of employment
Retail trade
23.2%
Education & healthcare
15.3%
Public administration
14.0%
Arts, food & hospitality
13.7%
Other services
7.9%
Professional & management
7.7%
Finance & real estate
5.2%
Construction
4.3%
Manufacturing
4.1%
Information
2.3%
Transportation & utilities
1.2%
Agriculture & mining
1.0%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 33.1% |
| Service | 18.3% |
| Sales & office | 37.7% |
| Natural resources & construction | 6.4% |
| Production & transportation | 4.5% |
Employment type
| Type | % |
|---|---|
| Private sector | 57.8% |
| Government | 28.3% |
| Self-employed | 13.9% |
| Unpaid family workers | 0.0% |
Commute
| Method | % |
|---|---|
| Drive alone | 85.7% |
| Carpool | 4.1% |
| Public transit | 0.0% |
| Walk | 1.8% |
| Work from home | 6.0% |
| Other means | 2.4% |
| Avg commute (minutes) | 12.3 |
Poverty
All people
8.5%
Under 18 years
9.3%
18 and over
7.9%
Married-couple families
5.9%
Female-led households
60.8%
Income support
| Source | % of households |
|---|---|
| Social Security | 0.8% |
| Retirement income | 1.5% |
| Supplemental Security | 1.8% |
| Cash public assistance | 2.1% |
| Food stamps / SNAP | 2.3% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 30.8% |
| High blood pressure | 16.7% |
| High cholesterol | 15.3% |
| Diabetes | 3.4% |
| Heart disease | 1.5% |
| Stroke | 1.0% |
| Asthma | 10.7% |
| Arthritis | 8.9% |
| Kidney disease | 1.1% |
| Pulmonary disease | 2.8% |
| Cancer | 1.7% |
| Behavior / access | % |
|---|---|
| Smoking | 17.4% |
| Binge drinking | 23.7% |
| No physical activity | 21.9% |
| Less than 7 hrs sleep | 35.8% |
| Depression | 24.2% |
| Fair or poor health | 8.2% |
| Poor mental health | 18.4% |
| Poor physical health | 6.1% |
| No health insurance | 14.3% |
| Visited doctor (checkup) | 73.6% |
| Visited dentist | 58.7% |
| Cholesterol screening | 80.9% |
| Teeth loss | 13.7% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 805 | 17.5% |
| Disability | % |
|---|---|
| Any disability | 3.5% |
| Under 18 | 2.6% |
| 18–64 years | 4.3% |
| 65 and over | 57.6% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 94.6% |
| Public insurance | 8.7% |
| No insurance | 1.3% |
| Uninsured under 19 | 0.0% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 11,316 | 80.5% |
| Spanish | 962 | 8.5% |
| Other Indo-European | 584 | 5.2% |
| Asian & Pacific Islander | 321 | 2.8% |
| Other languages | 53 | 0.5% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 12,883 | 91.7% |
| Born in same state | 11,685 | 83.2% |
| Born in different state | 2,277 | 16.2% |
| Foreign born | 1,198 | 8.5% |
| Naturalized citizen | 1,167 | 8.3% |
| Not a US citizen | 779 | 66.8% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Italian | 1,332 | 9.5% |
| French | 1,129 | 8% |
| Arab | 543 | 3.9% |
| Polish | 68 | 0.5% |
| Ancestry | Count | % |
|---|---|---|
| English | 58 | 0.4% |
| German | 53 | 0.4% |
| Dutch | 35 | 0.2% |
| Irish | 6 | 0% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 32.9% |
| Internet access | 96.8% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 13603
What city is ZIP code 13603 in?
ZIP code 13603 is primarily assigned to Watertown, New York.
What county is ZIP code 13603 in?
ZIP code 13603 falls within Jefferson County, New York.
Is ZIP code 13603 mostly rentals?
97% of occupied units in ZIP code 13603 are renter-occupied.
Is ZIP code 13603 family-oriented?
40% of residents in ZIP code 13603 are under 18, reflecting a younger, family-oriented community.
Does ZIP code 13603 have a large veteran population?
18% of civilians in ZIP code 13603 are veterans, above the national average of ~7%.
What is the population of ZIP code 13603?
ZIP code 13603 has an estimated population of 14,050 residents, with a density of 2,537 people per square mile.
What timezone is ZIP code 13603 in?
ZIP code 13603 observes the EST timezone.