Town · New York
Town of New Castle, New York
New Castle (town), town, in Westchester County, New York. New Castle (town) had 18,259 residents on July 1, 2025 by the Census Bureau's estimate, down 0.3% since 2020; the 2020 Census counted 18,311 and the ACS 2020-2024 5-year estimates put it at 18,022 (±61). GEOID 3611950078.
Residents, July 2025 estimate
18,259
Census Bureau estimate (no margin published)
2020 Census count: 18,311 · ACS 2020-2024: 18,022 ±61
Median household income
$250,000 or more
The survey's top or bottom value; no margin is published
New York: $85,974
Median home value
$1,038,800
±$61,143 (90% margin)
New York: $423,800
Median gross rent
$2,742
±$514 (90% margin)
New York: $1,621
Where is New Castle (town) and what county is it in?
New Castle (town) is a town in Westchester County, New York. It covers 23.1 square miles of land, 793 residents per square mile in 2020.
2 places lie inside the Town of New Castle: Chappaqua (CDP, 2,598 in 2020) and Millwood (CDP, 1,081 in 2020).
New Castle (town) is in the New York-Newark-Jersey City, NY-NJ metropolitan statistical area, which takes in 22 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in New Castle (town), and is it growing?
The Census Bureau estimates that 18,259 people lived in New Castle (town) on July 1, 2025, down 0.3% since 2020, a smaller fall than New York's (−1.0%). The 2020 Census counted 18,311 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 18,022 (±61).
| Measure | New Castle (town) | Westchester County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 18,022±61 | 999,677 | +117 |
| Households | 6,105±274 | 372,883 | no clear change |
| Average household size | 2.93±0.13 | 2.61 | no clear change |
| Housing units | 6,516±314 | 394,358 | no clear change |
New Castle (town)'s population since 2000
From 17,491 in 2000 to 18,259 in 2025: up 4.4%. The 2000, 2010 and 2020 figures are census counts, each for New Castle (town) as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in New Castle (town)?
The median resident of New Castle (town) is 42.2 years old; 26.0% are under 18 and 15.3% are 65 or older. The largest group is non-Hispanic white residents at 73.7%, then Hispanic or Latino residents (of any race) at 10.4%. 12.3% of residents were born outside the United States.
| Measure | New Castle (town) | Westchester County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 42.2±2.2 | 41.8 | no clear change |
| Under 18 years | 26.0%±2.0 pts | 21.3% | – |
| 65 years and over | 15.3%±2.3 pts | 18.2% | – |
| Male | 49.3%±2.2 pts | 48.8% | – |
| Hispanic or Latino (any race) | 10.4%±2.8 pts | 27.4% | +7.9 pts |
| White alone, not Hispanic | 73.7%±3.9 pts | 49.2% | −10.6 pts |
| Black or African American alone, not Hispanic | 1.7%±1.2 pts | 12.7% | – |
| Asian alone, not Hispanic | 9.6%±1.8 pts | 6.2% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±0.2 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.1 pts | 0.0% | – |
| Two or more races, not Hispanic | 4.0%±2.2 pts | 3.3% | – |
| Some other race alone, not Hispanic | 0.7%±1.0 pts | 1.2% | – |
| Born outside the United States | 12.3%±2.3 pts | 26.1% | no clear change |
| Speak a language other than English at home (age 5+) | 15.7%±3.6 pts | 34.8% | – |
| Civilian veterans (age 18+) | 3.2%±1.5 pts | 2.9% | – |
| With a disability | 7.7%±1.8 pts | 10.7% | – |
| No health insurance coverage | 1.4%±1.0 pts | 5.1% | – |
| High school graduate or higher (age 25+) | 96.6%±1.8 pts | 89.4% | – |
| Bachelor's degree or higher (age 25+) | 81.5%±3.7 pts | 53.1% | no clear change |
| Graduate or professional degree (age 25+) | 48.2%±5.1 pts | 26.7% | – |
| Lived in the same house a year earlier | 93.3%±2.4 pts | 91.0% | – |
| Moved from another state in the past year | 1.7%±1.1 pts | 1.2% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in New Castle (town) earn?
Half of New Castle (town)'s 6,105 households earn less than $250,000 or more a year (), against $118,976 in Westchester County and $85,974 in New York. In 2015-2019 the median was $250,000 or more in 2024 dollars, so it fell by $54,091 after inflation. 2.5% of residents live below the poverty line.
| Measure | New Castle (town) | Westchester County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $250,000 or more | $118,976 | −$54,091 |
| Mean household income | $361,359±$35,058 | $192,041 | – |
| Per capita income | $123,827±$11,818 | $72,705 | no clear change |
| People below the poverty line | 2.5%±1.4 pts | 9.0% | no clear change |
| Children under 18 below the poverty line | 1.7%±2.0 pts | 10.5% | – |
| Households receiving SNAP | 1.0%±1.1 pts | 9.4% | – |
| Households with a computer | 99.1%±0.9 pts | 96.3% | – |
| Households with a broadband subscription | 98.3%±1.2 pts | 93.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in New Castle (town)?
Owners occupy 85.7% of New Castle (town)'s occupied homes and renters 14.3%. The median owner-occupied home is valued at $1,038,800 by its owner (±$61,143). The median renter pays $2,742 a month including utilities, and 50.7% of renters pay 35% or more of their income on rent.
| Measure | New Castle (town) | Westchester County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $1,038,800±$61,143 | $663,200 | no clear change |
| Median gross rent | $2,742±$514 | $1,951 | no clear change |
| Renters paying 35% or more of income on rent | 50.7%±17.1 pts | 44.5% | no clear change |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 | – |
| Owner-occupied homes | 85.7%±4.1 pts | 61.8% | −7.5 pts |
| Renter-occupied homes | 14.3%±4.1 pts | 38.2% | – |
| Housing units | 6,516±314 | 394,358 | no clear change |
| Homeowner vacancy rate | 0.4%±0.7 pts | 0.8% | – |
| Rental vacancy rate | 0.0%±4.7 pts | 2.5% | – |
| Single-family detached homes | 81.1%±4.0 pts | 43.4% | – |
| Mobile homes | 0.0%±0.6 pts | 0.2% | – |
| Built 2020 or later | 0.0%±0.6 pts | 1.0% | – |
| Built 2010 to 2019 | 2.3%±1.8 pts | 4.2% | – |
| Built 1939 or earlier | 20.8%±5.8 pts | 27.5% | – |
| Households with no vehicle | 1.9%±1.6 pts | 14.3% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is New Castle (town) building?
Builders took permits for 4 new housing units in New Castle (town) in 2025 (4 in single-family houses), 0.2 per 1,000 residents against 1.9 across New York.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in New Castle (town) work and get to work?
45.7% of New Castle (town)'s workers drive alone and 35.3% work from home. The average trip to work takes 45.4 minutes. The unemployment rate in 2020-2024 averaged 4.2%.
| Measure | New Castle (town) | Westchester County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 65.5%±3.5 pts | 65.1% | – |
| Unemployment rate | 4.2%±1.9 pts | 6.1% | no clear change |
| Drove alone to work | 45.7%±5.2 pts | 50.4% | – |
| Carpooled | 4.0%±3.2 pts | 7.1% | – |
| Public transportation | 13.6%±2.8 pts | 17.3% | – |
| Walked | 0.2%±0.4 pts | 3.7% | – |
| Worked from home | 35.3%±5.3 pts | 19.1% | +28.2 pts |
| Mean travel time to work | 45.4 min±4.2 | 34.6 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in New Castle (town)?
3 census tracts lie mostly in New Castle (town) (2020 census blocks). Their median household incomes run from $241,250 (Tract 131.03) to $250,000 or more (Tract 131.04).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 131.02Westchester County | 6,470 | $250,000 or more |
| Tract 131.03Westchester County | 5,804 | $241,250 |
| Tract 131.04Westchester County | 5,748 | $250,000 or more |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in New Castle (town)) · Census block assignment files
How does New Castle (town) compare with other places in New York?
By the Census Bureau's July 2025 estimates, New Castle (town) is the 660th-most populous of the 16,079 U.S. towns and townships that have one and the 85th-most populous of 924 in New York.
New Castle (town) ranks 1st of 1,623 places in New York with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 85th | 924 |
| Growth 2020-2025 (PEP) | 387th | 1,225 |
| Residents per square mile | 740th | 1,657 |
| Median household income | 1st | 1,623 |
| Per capita income | 33rd | 1,653 |
| Median home value | 70th | 1,637 |
| Median gross rent | 68th | 1,515 |
| Poverty rate | 1,314th | 1,331 |
| Bachelor's degree or higher | 18th | 1,640 |
| Median age | 977th | 1,654 |
| Owner-occupied share | 490th | 1,639 |
| Work from home | 16th | 1,350 |
| Travel time to work | 26th | 1,652 |
New Castle (town)'s figures with every place in New York (CSV)
Every place in New York, sortable · Compare New Castle (town) with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for New Castle (town)?
15 of the 57 figures for New Castle (town) on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for New Castle (town) are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.