Residential delivery area · New York
ZIP Code 10543: Mamaroneck, NY
ZIP code 10543 is in Mamaroneck, New York, entirely in Westchester County (Census 2020 ZIP-county file). About 21,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $126,417 (Census Bureau, ACS 2020-2024). By Census place, 73% of its land lies in Mamaroneck, and 3% in smaller places; 24% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Mamaroneck · its only residential ZIP
- County
- Westchester County
- Census places
- Mamaroneck
- Metro area
- New York-Newark-Jersey City, NY-NJ
- House district
- NY-16 119th Congress
- State
- New York
- Time zone
- Eastern
- Land area
- 4.3 sq mi · 4,901 people per sq mi
Where is ZIP code 10543?
10543 centers on 40.953°, -73.736° and covers 4.3 square miles of land plus 0.1 of water. It borders 5 ZIP codes: 10538, 10528, 10580, 10583, 10605.
The map draws ZIP code areas only. For the streets inside 10543, 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 10543 compare with the rest of Westchester County?
| Measure | 10543 | In Westchester County | In NY |
|---|---|---|---|
| People (ACS 2020-2024) | 20,989 | 17th of 77 | 317th of 1,826 |
| Median household income | $126k | 38th of 61 | 195th of 1,081 |
| Median home value | $730k | 27th of 65 | 167th of 1,172 |
Its median household income is higher than in 92% of U.S. residential ZIP codes, and it is denser than 94% 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 10543?
The 2020 Census counted 21,296 people in 10543; the ACS, which samples households over 2020-2024, estimates 20,989. Between the 2010 and 2020 censuses its population grew 5.8% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 20,989
- 2020 Census count
- 21,296+5.8% since 2010 (20,135)
- Households
- 7,630
- Median age
- 39.8
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 10543?
Of the 20,989 people the ACS estimates in 10543, 24.4% are under 18 and 13.8% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (57.7%), then Hispanic or Latino (26.0%).
- Under 1824.4%
- 18 to 6461.8%
- 65 and older13.8%
- White, not Hispanic57.7%
- Hispanic or Latino26.0%
- Asian, not Hispanic6.1%
- Other or two or more5.7%
- Black, not Hispanic4.5%
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 10543 earn?
Median household income is $126,417 (ACS 2020-2024), the 38th highest of the 61 ranked ZIP codes in Westchester County. It is not measurably different from 2015-2019 ($127,916 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $126,417±$23,692
- Income per person
- $75,380
- Below the poverty line
- 10.2%
- Unemployed (of the labor force)
- 4.5%
- Adults 25+ with a bachelor's degree
- 58.1%
- Adjusted gross income per tax return, 2022
- $220,5009,870 returns; wages 62% 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 10543?
FHFA's house price index for 10543, built from repeat sales and appraisals of the same homes, rose 58% from 2015 to 2025 and rose 37% from 2020 to 2025, and moved +1.0% in 2025.
- Median home value (owners' estimate)
- $729,600
- Median gross rent
- $2,165
- Homes owned by their occupants
- 58.2%
- Housing units
- 8,212
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 10543?
880 business establishments had a location in this ZIP code in 2023, 15 fewer than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction108
- Other services (except public administration)108
- Health care and social assistance101
- Retail trade87
- Professional, scientific, and technical services85
- Accommodation and food services81
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 10543?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 10538 | Larchmont | 17,760 | $208k | 1.5 mi |
| 10528 | Harrison | 14,091 | $154k | 1.6 mi |
| 10580 | Rye | 18,391 | $250k+ | 2.9 mi |
| 10583 | Scarsdale | 40,207 | $250k+ | 3.7 mi |
| 10605 | White Plains | 19,493 | $149k | 4.0 mi |
| 10804 | New Rochelle | 16,108 | $250k+ | 2.7 mi (near) |
| 10801 | New Rochelle | 42,754 | $86k | 3.5 mi (near) |
| 10709 | Eastchester | 10,352 | $170k | 3.8 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.