Census-designated place · Pennsylvania
Stonybrook, Pennsylvania
Stonybrook, census-designated place, in York County, Pennsylvania. Stonybrook had 3,281 residents in the 2020 Census, a full count; the ACS 2020-2024 5-year estimates put it at 3,483 (±917). GEOID 4274416.
Residents, 2020 Census
3,281
Census count or controlled total
ACS 2020-2024 estimate: 3,483 ±917
Median household income
$126,029
±$40,996 (90% margin)
Pennsylvania: $77,971
Median home value
$370,800
±$43,065 (90% margin)
Pennsylvania: $254,500
Median gross rent
not published
Pennsylvania: $1,209
Where is Stonybrook and what county is it in?
Stonybrook is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in York County, Pennsylvania. It covers 1.9 square miles of land, 1,719 residents per square mile in 2020.
Stonybrook is in the York-Hanover, PA metropolitan statistical area (Census Bureau delineation, July 2023).
Stonybrook lies mostly within Springettsbury Township and reaches into Hellam Township and Windsor Township (York County), towns or townships with their own local government (2020 census blocks).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Stonybrook, and is it growing?
The 2020 Census counted 3,281 residents in Stonybrook, a full count rather than a sample. The 2020-2024 American Community Survey, a sample, estimates 3,483 (±917).
The Census Bureau publishes yearly population estimates for incorporated places only; Stonybrook is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Stonybrook | York County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 3,483 ±917 | 462,924 | +1,332 |
| Households | 1,174 ±285 | 181,583 | +359 |
| Average household size | 2.96 ±0.35 | 2.51 | no clear change |
| Housing units | 1,184 ±284 | 189,857 | +369 |
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 Stonybrook?
The median resident of Stonybrook is 42.2 years old; 27.7% are under 18 and 20.6% are 65 or older. The largest group is non-Hispanic white residents at 82.7%, then Hispanic or Latino residents (of any race) at 9.0%.
| Measure | Stonybrook | York County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 42.2 ±6.1 | 41.1 | no clear change |
| Under 18 years | 27.7% ±4.4 pts | 21.9% | – |
| 65 years and over | 20.6% ±4.5 pts | 18.8% | – |
| Male | 53.8% ±6.2 pts | 49.8% | – |
| Hispanic or Latino (any race) | 9.0% ±5.8 pts | 9.6% | – |
| White alone, not Hispanic | 82.7% ±7.8 pts | 78.9% | no clear change |
| Black or African American alone, not Hispanic | 1.5% ±2.0 pts | 5.8% | – |
| Asian alone, not Hispanic | 4.0% ±4.1 pts | 1.5% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.1% ±0.1 pts | 0.0% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.9 pts | 0.0% | – |
| Two or more races, not Hispanic | 2.8% ±2.3 pts | 3.6% | – |
| Some other race alone, not Hispanic | 0.0% ±0.9 pts | 0.6% | – |
| Born outside the United States | 3.1% ±2.9 pts | 4.1% | – |
| Speak a language other than English at home (age 5+) | 7.2% ±6.0 pts | 8.3% | – |
| Civilian veterans (age 18+) | 6.7% ±3.1 pts | 7.3% | – |
| With a disability | 8.4% ±4.2 pts | 14.0% | – |
| No health insurance coverage | 2.2% ±1.8 pts | 4.8% | – |
| High school graduate or higher (age 25+) | 97.5% ±2.7 pts | 92.0% | – |
| Bachelor's degree or higher (age 25+) | 45.3% ±8.9 pts | 27.6% | no clear change |
| Graduate or professional degree (age 25+) | 17.0% ±5.7 pts | 10.4% | – |
| Lived in the same house a year earlier | 94.0% ±6.0 pts | 90.1% | – |
| Moved from another state in the past year | 0.0% ±0.9 pts | 1.9% | – |
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 Stonybrook earn?
Half of Stonybrook's 1,174 households earn less than $126,029 a year (±$40,996), against $84,829 in York County and $77,971 in Pennsylvania. In 2015-2019 it was $129,736 in 2024 dollars; the margins of error cannot tell the two periods apart.
| Measure | Stonybrook | York County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $126,029 ±$40,996 | $84,829 | no clear change |
| Mean household income | $150,371 ±$37,279 | $104,143 | – |
| Per capita income | $50,198 ±$9,607 | $41,601 | no clear change |
| People below the poverty line | 2.3% ±1.6 pts | 8.4% | – |
| Children under 18 below the poverty line | 0.0% ±3.4 pts | 10.7% | – |
| Households receiving SNAP | 9.6% ±11.3 pts | 11.3% | – |
| Households with a computer | 97.4% ±3.1 pts | 93.9% | – |
| Households with a broadband subscription | 95.2% ±4.0 pts | 90.3% | – |
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 Stonybrook?
Owners occupy 89.4% of Stonybrook's occupied homes and renters 10.6%. The median owner-occupied home is valued at $370,800 by its owner (±$43,065).
| Measure | Stonybrook | York County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $370,800 ±$43,065 | $248,600 | +$75,187 |
| Renters paying 35% or more of income on rent | 100.0% ±24.6 pts | 38.3% | no clear change |
| Median monthly owner costs, with a mortgage | $2,340 ±$464 | $1,765 | – |
| Owner-occupied homes | 89.4% ±11.4 pts | 76.3% | no clear change |
| Renter-occupied homes | 10.6% ±11.4 pts | 23.7% | – |
| Housing units | 1,184 ±284 | 189,857 | +369 |
| Homeowner vacancy rate | 0.0% ±3.0 pts | 0.5% | – |
| Rental vacancy rate | 0.0% ±22.6 pts | 3.3% | – |
| Single-family detached homes | 83.6% ±11.2 pts | 64.3% | – |
| Mobile homes | 4.2% ±2.8 pts | 4.1% | – |
| Built 2020 or later | 0.7% ±1.1 pts | 1.3% | – |
| Built 2010 to 2019 | 16.6% ±16.5 pts | 5.6% | – |
| Built 1939 or earlier | 12.1% ±11.5 pts | 18.3% | – |
| Households with no vehicle | 12.3% ±11.5 pts | 5.9% | – |
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 do people in Stonybrook work and get to work?
84.3% of Stonybrook's workers drive alone and 8.7% work from home. The average trip to work takes 24.5 minutes.
| Measure | Stonybrook | York County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 64.1% ±6.8 pts | 65.7% | – |
| Unemployment rate | 0.0% ±1.9 pts | 4.5% | – |
| Drove alone to work | 84.3% ±9.7 pts | 76.9% | – |
| Carpooled | 0.2% ±0.5 pts | 7.4% | – |
| Public transportation | 6.7% ±8.3 pts | 0.6% | – |
| Walked | 0.0% ±1.9 pts | 1.6% | – |
| Worked from home | 8.7% ±5.3 pts | 12.4% | no clear change |
| Mean travel time to work | 24.5 min ±4.5 | 26.3 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 Stonybrook?
1 census tract lies mostly in Stonybrook, and 3 more reach into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 101.30York County | 4,144 | $123,578 |
| Tract 101.31York County | 3,728 | $70,467 |
| Tract 235York County | 5,061 | $83,904 |
| Tract 233.01York County | 6,418 | $93,322 |
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 Stonybrook) · Census block assignment files
How does Stonybrook compare with other places in Pennsylvania?
Stonybrook ranks 161st of 2,136 places in Pennsylvania with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 924th | 2,159 |
| Residents per square mile | 714th | 2,159 |
| Median household income | 161st | 2,136 |
| Per capita income | 436th | 2,157 |
| Median home value | 282nd | 2,146 |
| Bachelor's degree or higher | 323rd | 2,129 |
| Median age | 1,333rd | 2,157 |
| Owner-occupied share | 460th | 2,149 |
| Work from home | 1,322nd | 1,710 |
| Travel time to work | 1,292nd | 2,156 |
Stonybrook's figures with every place in Pennsylvania (CSV)
Every place in Pennsylvania, sortable · Compare Stonybrook 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 Stonybrook?
25 of the 56 figures for Stonybrook 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 Stonybrook 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.