Census-designated place · Pennsylvania
Rosemont, Pennsylvania
Rosemont, census-designated place, mostly in Delaware County (60.3% of its 2020 residents), with a part in Montgomery County, Pennsylvania. Rosemont had 3,507 residents in the 2020 Census, a full count; the ACS 2020-2024 5-year estimates put it at 3,421 (±499). GEOID 4266144.
Residents, 2020 Census
3,507
Census count or controlled total
ACS 2020-2024 estimate: 3,421 ±499
Median household income
$88,322
±$28,746 (90% margin)
Pennsylvania: $77,971
Median home value
$643,600
±$138,163 (90% margin)
Pennsylvania: $254,500
Median gross rent
$1,747
±$71 (90% margin)
Pennsylvania: $1,209
Where is Rosemont and what county is it in?
Rosemont is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, mostly in Delaware County (60.3% of its 2020 residents), with a part in Montgomery County, Pennsylvania. It covers 0.8 square miles of land, 4,272 residents per square mile in 2020.
Rosemont is in the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metropolitan statistical area, which takes in 11 counties (Census Bureau delineation, July 2023).
Rosemont lies mostly within Lower Merion Township and reaches into Radnor Township, towns or townships with their own local government (2020 census blocks).
| County | 2020 residents | Share |
|---|---|---|
| Delaware County | 2,114 | 60.3% |
| Montgomery County | 1,393 | 39.7% |
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Rosemont, and is it growing?
The 2020 Census counted 3,507 residents in Rosemont, a full count rather than a sample. The 2020-2024 American Community Survey, a sample, estimates 3,421 (±499).
The Census Bureau publishes yearly population estimates for incorporated places only; Rosemont is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Rosemont | Delaware County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 3,421 ±499 | 579,222 | – |
| Households | 1,381 ±186 | 216,946 | – |
| Average household size | 2.12 ±0.25 | 2.56 | – |
| Housing units | 1,461 ±192 | 229,715 | – |
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 Rosemont?
The median resident of Rosemont is 38.5 years old; 18.6% are under 18 and 21.8% are 65 or older. The largest group is non-Hispanic white residents at 69.9%, then non-Hispanic Asian residents at 10.3%. 12.6% of residents were born outside the United States.
| Measure | Rosemont | Delaware County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 38.5 ±4.7 | 39.1 | – |
| Under 18 years | 18.6% ±6.0 pts | 22.0% | – |
| 65 years and over | 21.8% ±4.9 pts | 17.4% | – |
| Male | 42.0% ±4.8 pts | 48.4% | – |
| Hispanic or Latino (any race) | 8.1% ±4.5 pts | 5.0% | – |
| White alone, not Hispanic | 69.9% ±5.9 pts | 62.4% | – |
| Black or African American alone, not Hispanic | 3.6% ±2.3 pts | 21.9% | – |
| Asian alone, not Hispanic | 10.3% ±4.9 pts | 6.3% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.9 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 | 7.8% ±4.9 pts | 3.8% | – |
| Some other race alone, not Hispanic | 0.4% ±0.7 pts | 0.5% | – |
| Born outside the United States | 12.6% ±4.6 pts | 11.2% | – |
| Speak a language other than English at home (age 5+) | 17.1% ±5.1 pts | 13.5% | – |
| Civilian veterans (age 18+) | 3.9% ±2.4 pts | 4.9% | – |
| With a disability | 6.0% ±2.5 pts | 12.5% | – |
| No health insurance coverage | 3.3% ±2.7 pts | 4.6% | – |
| High school graduate or higher (age 25+) | 94.6% ±4.1 pts | 93.9% | – |
| Bachelor's degree or higher (age 25+) | 78.5% ±7.0 pts | 41.9% | – |
| Graduate or professional degree (age 25+) | 43.1% ±9.6 pts | 18.4% | – |
| Lived in the same house a year earlier | 82.8% ±7.3 pts | 90.7% | – |
| Moved from another state in the past year | 5.7% ±3.2 pts | 1.6% | – |
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 Rosemont earn?
Half of Rosemont's 1,381 households earn less than $88,322 a year (±$28,746), against $89,546 in Delaware County and $77,971 in Pennsylvania. 8.0% of residents live below the poverty line.
| Measure | Rosemont | Delaware County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $88,322 ±$28,746 | $89,546 | – |
| Mean household income | $189,818 ±$36,609 | $128,465 | – |
| Per capita income | $87,760 ±$18,453 | $49,673 | – |
| People below the poverty line | 8.0% ±4.2 pts | 10.2% | – |
| Children under 18 below the poverty line | 0.0% ±5.1 pts | 13.2% | – |
| Households receiving SNAP | 1.5% ±1.9 pts | 13.3% | – |
| Households with a computer | 100.0% ±2.3 pts | 96.4% | – |
| Households with a broadband subscription | 99.1% ±1.1 pts | 93.3% | – |
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 Rosemont?
Owners occupy 49.2% of Rosemont's occupied homes and renters 50.8%. The median owner-occupied home is valued at $643,600 by its owner (±$138,163). The median renter pays $1,747 a month including utilities, and 55.2% of renters pay 35% or more of their income on rent.
| Measure | Rosemont | Delaware County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $643,600 ±$138,163 | $332,200 | – |
| Median gross rent | $1,747 ±$71 | $1,372 | – |
| Renters paying 35% or more of income on rent | 55.2% ±12.7 pts | 45.9% | – |
| Median monthly owner costs, with a mortgage | $3,268 ±$329 | $2,222 | – |
| Owner-occupied homes | 49.2% ±7.4 pts | 69.6% | – |
| Renter-occupied homes | 50.8% ±7.4 pts | 30.4% | – |
| Housing units | 1,461 ±192 | 229,715 | – |
| Homeowner vacancy rate | 0.0% ±4.7 pts | 0.6% | – |
| Rental vacancy rate | 6.1% ±6.9 pts | 4.8% | – |
| Single-family detached homes | 36.2% ±5.9 pts | 43.6% | – |
| Mobile homes | 0.0% ±2.2 pts | 0.3% | – |
| Built 2020 or later | 0.5% ±0.8 pts | 0.6% | – |
| Built 2010 to 2019 | 3.4% ±3.3 pts | 2.9% | – |
| Built 1939 or earlier | 18.2% ±5.9 pts | 22.1% | – |
| Households with no vehicle | 4.5% ±3.5 pts | 9.6% | – |
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 Rosemont work and get to work?
47.7% of Rosemont's workers drive alone and 22.6% work from home. The average trip to work takes 24.1 minutes.
| Measure | Rosemont | Delaware County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 64.0% ±6.2 pts | 65.6% | – |
| Unemployment rate | 1.8% ±2.2 pts | 6.9% | – |
| Drove alone to work | 47.7% ±8.5 pts | 64.4% | – |
| Carpooled | 10.7% ±6.0 pts | 6.6% | – |
| Public transportation | 8.3% ±4.1 pts | 5.9% | – |
| Walked | 10.7% ±5.1 pts | 3.3% | – |
| Worked from home | 22.6% ±6.8 pts | 18.0% | – |
| Mean travel time to work | 24.1 min ±3.1 | 28.1 min | – |
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 Rosemont?
No census tract lies mostly in Rosemont; 3 tracts reach into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 2049Montgomery County | 5,649 | $250,000 or more |
| Tract 4096.02Delaware County | 5,227 | $77,546 |
| Tract 9801Delaware County | 3,099 | $188,558 |
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 Rosemont) · Census block assignment files
How does Rosemont compare with other places in Pennsylvania?
Rosemont ranks 708th 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) | 939th | 2,159 |
| Residents per square mile | 203rd | 2,159 |
| Median household income | 708th | 2,136 |
| Per capita income | 32nd | 2,157 |
| Median home value | 37th | 2,146 |
| Median gross rent | 169th | 1,963 |
| Poverty rate | 955th | 1,606 |
| Bachelor's degree or higher | 16th | 2,129 |
| Median age | 1,751st | 2,157 |
| Owner-occupied share | 2,019th | 2,149 |
| Work from home | 218th | 1,710 |
| Travel time to work | 1,354th | 2,156 |
Rosemont's figures with every place in Pennsylvania (CSV)
Every place in Pennsylvania, sortable · Compare Rosemont 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 Rosemont?
13 of the 57 figures for Rosemont 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 Rosemont 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.