What city is 10603 in?

10603 is a White Plains, NY mailing address. By land area, 22% lies inside White Plains and 4% lies inside Fairview; the rest is outside any Census-defined city or community.

What county is 10603 in?

10603 is in Westchester County.

What is the population of 10603?

About 18,910 people (±1,832), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 18,033.

What is the median household income in 10603?

$121,026 (±$22,423), compared with $85,974 for New York as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 10603?

13 USPS carrier routes with 7,203 residential and 434 business mailboxes (7,637 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 10603?

The closest, measured center to center: 10601 (1.7 mi, White Plains), 10607 (1.9 mi, Fairview), 10523 (2.1 mi, Elmsford), 10604 (2.1 mi, Harrison), 10595 (2.3 mi, Valhalla) and 10606 (2.3 mi, White Plains).

10603 ZIP Code, White Plains, NY

10603 is a ZIP code in White Plains, New York in Westchester County. It covers 3.4 square miles of land. The closest ZIP codes are 10601, 10607 and 10523. 18,910 people live here in 7,128 households. At about 5,613 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (65% own). Median household income is $121,026, above the New York median of $85,974.

Quick facts

Mailing city: White Plains, NY
County: Westchester County
Land area: 3.4 sq mi
Population: 18,910
Median household income: $121,026
Carrier routes: 13 (7,203 homes)

Key figures

Measure	Value
Residents	18,910
Households	7,128
Median household income	$121,026
Income per person	$58,137
Median age	39.2
Homeowners	64.6%
Median home value	$503,000
Median rent	$1,996
Bachelor's degree or higher	45.9%
Average commute (minutes)	28.3
Households with kids under 18	34.0%
Moved in the past year	9.0%
Below the poverty line	7.6%
Broadband internet	96.8%
Speak a non-English language at home	46.4%

Household income

% of households	Value
<$10K	3.7%
$10–15K	3.1%
$15–25K	3.1%
$25–35K	4.6%
$35–50K	5.0%
$50–75K	11.8%
$75–100K	11.1%
$100–150K	17.3%
$150–200K	10.2%
$200K+	30.1%

Age

% of all residents	Value
<10	14.2%
10–19	7.4%
20–24	5.4%
25–34	16.5%
35–44	14.2%
45–54	11.2%
55–64	14.7%
65–74	9.6%
75+	6.9%

Tenure

% of housing units	Value
Owned, with mortgage	36.6%
Owned outright	24.9%
Rented	33.5%
Vacant	5.0%

Type of building

% of housing units	Value
Detached house	34.2%
Townhome	4.1%
2–4 units	17.7%
5–19 units	16.6%
20+ units	26.9%
Mobile / other	0.4%

Businesses in 10603

541 business establishments with 5,785 employees (ZIP Codes Business Patterns 2023).

Professional, Scientific, and Technical Services: 100
Construction: 84
Other Services (except Public Administration): 58
Health Care and Social Assistance: 50
Administrative and Support and Waste Management and Remediation Services: 45
Real Estate and Rental and Leasing: 41
Retail Trade: 34
Accommodation and Food Services: 34

EDDM carrier routes

10603 has 13 USPS carrier routes with 7,203 residential and 434 business mailboxes. Open the EDDM route map.

Carrier routes in 10603

10603 has 13 USPS carrier routes (13 city (C)) with 7,203 residential and 434 business mailboxes. Routes range from 203 homes (C015) to 1,020 homes (C037); the median route has 535 homes. The Census counted 7,128 households in 10603 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	1
250–499	5
500–749	6
750–999	0
1,000–1,499	1
1,500+	0

Best routes in 10603 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

Route C018 — USPS business mailboxes 99, 408 homes
Route C003 — USPS business mailboxes 83, 417 homes
Route C025 — USPS business mailboxes 68, 453 homes
Route C026 — USPS business mailboxes 56, 635 homes
Route C016 — USPS business mailboxes 50, 670 homes

Select these 5 routes on the route map

Every carrier route in 10603

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C003	City	417	83	$162,680	—	—	—
C004	City	340	10	$150,650	—	—	—
C005	City	586	6	$134,065	—	—	—
C010	City	720	4	$151,295	—	—	—
C013	City	718	4	$56,470	—	—	—
C015	City	203	0	$117,667	—	—	—
C016	City	670	50	$90,376	—	—	—
C018	City	408	99	$134,065	—	—	—
C020	City	498	19	$56,470	—	—	—
C022	City	535	6	$150,811	—	—	—
C025	City	453	68	$156,429	—	—	—
C026	City	635	56	$117,667	—	—	—
C037	City	1,020	29	$120,417	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 10603 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

10601 — White Plains city, NY (1.7 mi)
10607 — Fairview CDP, NY (1.9 mi)
10523 — Elmsford village, NY (2.1 mi)
10604 — Harrison village, NY (2.1 mi)
10595 — Valhalla CDP, NY (2.3 mi)
10606 — White Plains city, NY (2.3 mi)
10530 — Hartsdale CDP, NY (2.7 mi)
10532 — Hawthorne CDP, NY (3.4 mi)

Areas that include 10603

White Plains, NY ZIP codes — 6 ZIP codes
Fairview (Westchester County), NY ZIP codes — 2 ZIP codes
Westchester County ZIP codes — 75 ZIP codes
New York ZIP code data

Where it ranks

Mail every home in 10603

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 10603, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 10603 in?: 10603 is a White Plains, NY mailing address. By land area, 22% lies inside White Plains and 4% lies inside Fairview; the rest is outside any Census-defined city or community.
What county is 10603 in?: 10603 is in Westchester County.
What is the population of 10603?: About 18,910 people (±1,832), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 18,033.
What is the median household income in 10603?: $121,026 (±$22,423), compared with $85,974 for New York as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 10603?: 13 USPS carrier routes with 7,203 residential and 434 business mailboxes (7,637 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 10603?: The closest, measured center to center: 10601 (1.7 mi, White Plains), 10607 (1.9 mi, Fairview), 10523 (2.1 mi, Elmsford), 10604 (2.1 mi, Harrison), 10595 (2.3 mi, Valhalla) and 10606 (2.3 mi, White Plains).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.