10604 ZIP Code, West Harrison, NY
10604 is a ZIP code in West Harrison, New York in Westchester County. It covers 6.8 square miles of land. The closest ZIP codes are 10595, 10603 and 10601. 12,517 people live here in 4,517 households. At about 1,854 people per square mile it has suburban density, and owners and renters are mixed (49% own). Median household income is $117,014, above the New York median of $85,974.
Quick facts
- Mailing city: West Harrison, NY
- County: Westchester County
- Land area: 6.8 sq mi
- Population: 12,517
- Median household income: $117,014
- Carrier routes: 11 (5,140 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 12,517 |
| Households | 4,517 |
| Median household income | $117,014 |
| Income per person | $73,387 |
| Median age | 39.9 |
| Homeowners | 48.9% |
| Median home value | $735,700 |
| Median rent | $2,245 |
| Bachelor's degree or higher | 51.1% |
| Average commute (minutes) | 25.7 |
| Households with kids under 18 | 38.3% |
| Moved in the past year | 8.2% |
| Below the poverty line | 5.3% |
| Broadband internet | 92.6% |
| Speak a non-English language at home | 35.6% |
Household income
| % of households | Value |
|---|---|
| <$10K | 1.5% |
| $10–15K | 0.4% |
| $15–25K | 3.9% |
| $25–35K | 5.1% |
| $35–50K | 10.4% |
| $50–75K | 17.6% |
| $75–100K | 4.5% |
| $100–150K | 16.1% |
| $150–200K | 12.5% |
| $200K+ | 28.0% |
Age
| % of all residents | Value |
|---|---|
| <10 | 14.2% |
| 10–19 | 13.5% |
| 20–24 | 5.4% |
| 25–34 | 10.5% |
| 35–44 | 16.9% |
| 45–54 | 13.0% |
| 55–64 | 12.5% |
| 65–74 | 7.5% |
| 75+ | 6.5% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 26.9% |
| Owned outright | 19.9% |
| Rented | 48.3% |
| Vacant | 4.9% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 36.0% |
| Townhome | 4.2% |
| 2–4 units | 32.1% |
| 5–19 units | 3.2% |
| 20+ units | 24.4% |
| Mobile / other | 0.0% |
Businesses in 10604
624 business establishments with 10,831 employees (ZIP Codes Business Patterns 2023).
- Professional, Scientific, and Technical Services: 115
- Administrative and Support and Waste Management and Remediation Services: 73
- Health Care and Social Assistance: 62
- Finance and Insurance: 58
- Real Estate and Rental and Leasing: 53
- Transportation and Warehousing: 48
- Construction: 43
- Other Services (except Public Administration): 32
EDDM carrier routes
10604 has 11 USPS carrier routes with 5,140 residential and 911 business mailboxes. Open the EDDM route map.
Carrier routes in 10604
10604 has 11 USPS carrier routes (11 city (C)) with 5,140 residential and 911 business mailboxes. Routes range from 172 homes (C030) to 846 homes (C007); the median route has 399 homes. The Census counted 4,517 households in 10604 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 1 |
| 250–499 | 5 |
| 500–749 | 3 |
| 750–999 | 2 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 10604 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C007 — USPS business mailboxes 529, 846 homes
- Route C019 — USPS business mailboxes 158, 637 homes
- Route C028 — USPS business mailboxes 139, 267 homes
- Route C023 — USPS business mailboxes 56, 754 homes
- Route C024 — USPS business mailboxes 11, 535 homes
Select these 5 routes on the route map
Every carrier route in 10604
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C007 | City | 846 | 529 | $200,001+ | — | — | — |
| C010 | City | 399 | 7 | $200,001+ | — | — | — |
| C011 | City | 369 | 1 | $200,001+ | — | — | — |
| C014 | City | 293 | 3 | $200,001+ | — | — | — |
| C017 | City | 336 | 5 | $176,678 | — | — | — |
| C019 | City | 637 | 158 | $70,341 | — | — | — |
| C023 | City | 754 | 56 | $176,678 | — | — | — |
| C024 | City | 535 | 11 | $90,062 | — | — | — |
| C027 | City | 532 | 1 | $62,525 | — | — | — |
| C028 | City | 267 | 139 | $62,525 | — | — | — |
| C030 | City | 172 | 1 | $126,521 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 10604 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
- 10595 — Valhalla CDP, NY (2.1 mi)
- 10603 — White Plains city, NY (2.1 mi)
- 10601 — White Plains city, NY (2.8 mi)
- 10577 — Harrison village, NY (3 mi)
- 10594 — Thornwood CDP, NY (3.3 mi)
- 10532 — Hawthorne CDP, NY (3.4 mi)
- 10523 — Elmsford village, NY (3.8 mi)
- 10606 — White Plains city, NY (3.8 mi)
Areas that include 10604
- White Plains, NY ZIP codes — 6 ZIP codes
- Harrison, NY ZIP codes — 4 ZIP codes
- Rye Brook, NY ZIP codes — 2 ZIP codes
- West Harrison, NY ZIP codes — 1 ZIP code
- Westchester County ZIP codes — 75 ZIP codes
- New York ZIP code data
Where it ranks
- No. 19 of 65: highest share of households with children in Westchester County
- No. 14 of 65: lowest median age in Westchester County
- No. 9 of 64: fastest population growth in Westchester County
Mail every home in 10604
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) 10604, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 10604 in?
- 10604 is a West Harrison, NY mailing address. By land area, 54% lies inside Harrison, 23% lies inside White Plains and 5% lies inside Rye Brook; the rest is outside any Census-defined city or community.
- What county is 10604 in?
- 10604 is in Westchester County.
- What is the population of 10604?
- About 12,517 people (±1,297), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 11,526.
- What is the median household income in 10604?
- $117,014 (±$19,120), 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 10604?
- 11 USPS carrier routes with 5,140 residential and 911 business mailboxes (6,067 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 10604?
- The closest, measured center to center: 10595 (2.1 mi, Valhalla), 10603 (2.1 mi, White Plains), 10601 (2.8 mi, White Plains), 10577 (3 mi, Harrison), 10594 (3.3 mi, Thornwood) and 10532 (3.4 mi, Hawthorne).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.