Residential delivery area · New York
ZIP Code 10504: Armonk, NY
ZIP code 10504 uses the postal name Armonk, New York and lies entirely in Westchester County (Census 2020 ZIP-county file). About 7,700 people live there (Census Bureau, ACS 2020-2024). Median household income is $250,000 or more (Census Bureau, ACS 2020-2024). By Census place, 37% of its land lies in Armonk (a census-designated place); 63% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Armonk · its only residential ZIP
- County
- Westchester County
- Census places
- Armonk census-designated place
- Metro area
- New York-Newark-Jersey City, NY-NJ
- House district
- NY-17 119th Congress
- State
- New York
- Time zone
- Eastern
- Land area
- 16.1 sq mi · 475 people per sq mi
Where is ZIP code 10504?
10504 centers on 41.128°, -73.708° and covers 16.1 square miles of land plus 1.8 of water. It borders 7 ZIP codes: 06831, 10570, 10514, 10604, 10595, 10549, 10506.
The map draws ZIP code areas only. For the streets inside 10504, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 10504 compare with the rest of Westchester County?
| Measure | 10504 | In Westchester County | In NY |
|---|---|---|---|
| People (ACS 2020-2024) | 7,665 | 44th of 77 | 601st of 1,826 |
| Median household income | $250k+ | 1= of 61 | 1= of 1,081 |
| Median home value | $1.24M | 3rd of 65 | 28th of 1,172 |
1= means a shared first place: 10504's median household income ties with 10 other ZIP codes at the Census cap in Westchester County; median household income ties with 15 other ZIP codes at the Census cap in New York.
Its median household income is at the Census cap of $250,000 or more, like 117 other U.S. residential ZIP codes (69 of the 118 are large enough to rank), and it is denser than 72% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 10504?
The 2020 Census counted 8,258 people in 10504; the ACS, which samples households over 2020-2024, estimates 7,665. Between the 2010 and 2020 censuses its population grew 3.4% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 7,665
- 2020 Census count
- 8,258+3.4% since 2010 (7,987)
- Households
- 2,458
- Median age
- 44.2
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 10504?
Of the 7,665 people the ACS estimates in 10504, 27.3% are under 18 and 16.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (72.0%), then Hispanic or Latino (13.4%).
- Under 1827.3%
- 18 to 6456.1%
- 65 and older16.6%
- White, not Hispanic72.0%
- Hispanic or Latino13.4%
- Asian, not Hispanic6.7%
- Other or two or more5.8%
- Black, not Hispanic2.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 10504 earn?
Median household income is $250,000 or more (ACS 2020-2024), the highest of the 61 ranked ZIP codes in Westchester County.
- Median household income
- $250,000 or more
- Income per person
- $124,238
- Below the poverty line
- 4.6%
- Unemployed (of the labor force)
- 2.5%
- Adults 25+ with a bachelor's degree
- 80.2%
- Adjusted gross income per tax return, 2022
- $546,0883,890 returns; wages 51% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 10504?
FHFA's house price index for 10504, built from repeat sales and appraisals of the same homes, rose 43% from 2015 to 2025 and rose 27% from 2020 to 2025, and moved +2.9% in 2025.
- Median home value (owners' estimate)
- $1,243,100
- Median gross rent
- $3,131
- Homes owned by their occupants
- 90.1%
- Housing units
- 2,629
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 10504?
453 business establishments had a location in this ZIP code in 2023, 26 fewer than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services84
- Construction43
- Retail trade43
- Accommodation and food services41
- Finance and insurance37
- Real estate and rental and leasing37
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 10504?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 06831 | Greenwich, CT | 15,210 | $227k | 3.7 mi |
| 10570 | Pleasantville | 13,289 | $184k | 4.3 mi |
| 10514 | Chappaqua | 11,790 | $250k+ | 4.4 mi |
| 10604 | West Harrison | 12,517 | $117k | 4.4 mi |
| 10595 | Valhalla | 7,243 | $123k | 4.7 mi |
| 10549 | Mount Kisco | 16,135 | $134k | 5.1 mi |
| 10506 | Bedford | 6,244 | $250k+ | 5.5 mi |
| 10594 | Thornwood | 5,110 | $164k | 3.4 mi (near) |
| 10532 | Hawthorne | 5,347 | $141k | 5.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.