Census tract · Delaware County
Census Tract 4105, Delaware County, Pennsylvania
Census Tract 4105, GEOID 42045410500, in Delaware County, Pennsylvania, mostly within Upper Darby Township (76% of its census blocks). 4,688 residents in the ACS 2020-2024 5-year estimates (±618); the 2020 Census counted 5,319.
Residents, 2020-2024
4,688
±618 (90% margin)
2020 Census count: 5,319
Median household income
$63,355
±$11,433 (90% margin)
Delaware County: $89,546
Median home value
$184,600
±$19,459 (90% margin)
Delaware County: $332,200
Median gross rent
$1,268
±$200 (90% margin)
Delaware County: $1,372
Where is Census Tract 4105?
Census Tract 4105 is one of 152 census tracts in Delaware County, Pennsylvania. It covers 0.32 square miles of land, 16,519 residents per square mile in 2020. Its GEOID, 42045410500, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Upper Darby Township | 76% |
| Millbourne | 24% |
5 census tracts border Census Tract 4105: Tract 4003.01 ($49,959), Tract 4004.01 ($50,890), Tract 4005 ($49,435), Tract 83.01 in Philadelphia County ($32,008) and Tract 9808 in Philadelphia County*. The figure in brackets is each tract's median household income; * a special land-use tract (water, a park or an institution) with few or no residents.
Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.
Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files
How many people live in Census Tract 4105?
The 2020-2024 American Community Survey puts Census Tract 4105's population at 4,688 (±618) in 1,685 households; the 2020 Census counted 5,319 residents and 1,678 housing units.
| Measure | Tract 4105 | Upper Darby Township |
|---|---|---|
| Total population | 4,688 ±618 | 85,486 |
| Households | 1,685 ±211 | 33,208 |
| Average household size | 2.77 ±0.33 | 2.57 |
| Housing units | 1,799 ±193 | 35,306 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Census Tract 4105?
The median resident of Census Tract 4105 is 38.0 years old; 17.5% are under 18 and 14.2% are 65 or older. The largest group is non-Hispanic Asian residents at 52.3%, then non-Hispanic Black residents at 27.5%. 58.7% of residents were born outside the United States.
| Measure | Tract 4105 | Upper Darby Township |
|---|---|---|
| Median age | 38.0 ±8.0 | 35.7 |
| Under 18 years | 17.5% ±6.0 pts | 23.2% |
| 65 years and over | 14.2% ±3.6 pts | 13.0% |
| Hispanic or Latino (any race) | 2.8% ±3.1 pts | 9.9% |
| White alone, not Hispanic | 13.5% ±5.9 pts | 39.0% |
| Black or African American alone, not Hispanic | 27.5% ±11.3 pts | 33.7% |
| Asian alone, not Hispanic | 52.3% ±10.2 pts | 12.5% |
| American Indian and Alaska Native alone, not Hispanic | 1.2% ±1.1 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.7 pts | 0.0% |
| Two or more races, not Hispanic | 1.9% ±1.7 pts | 4.2% |
| Some other race alone, not Hispanic | 0.7% ±1.1 pts | 0.6% |
| Born outside the United States | 58.7% ±7.9 pts | 23.5% |
| Speak a language other than English at home (age 5+) | 65.8% ±8.5 pts | 27.5% |
| Civilian veterans (age 18+) | 1.2% ±1.4 pts | 3.4% |
| With a disability | 12.0% ±4.0 pts | 13.2% |
| No health insurance coverage | 11.9% ±7.0 pts | 8.8% |
| High school graduate or higher (age 25+) | 89.2% ±4.4 pts | 90.5% |
| Bachelor's degree or higher (age 25+) | 29.9% ±6.7 pts | 33.0% |
| Graduate or professional degree (age 25+) | 8.1% ±3.5 pts | 11.8% |
| Lived in the same house a year earlier | 93.8% ±2.8 pts | 89.9% |
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 Census Tract 4105 earn?
Half of the 1,685 households in Census Tract 4105 earn less than $63,355 a year (±$11,433), against $89,546 across Delaware County: 109th highest of the county's 147 tracts with a reliable estimate. 20.8% of residents live below the poverty line.
| Measure | Tract 4105 | Upper Darby Township |
|---|---|---|
| Median household income | $63,355 ±$11,433 | $71,481 |
| Mean household income | $88,063 ±$19,464 | $93,573 |
| Per capita income | $32,296 ±$6,954 | $36,993 |
| People below the poverty line | 20.8% ±7.4 pts | 14.4% |
| Children under 18 below the poverty line | 25.3% ±13.2 pts | 21.5% |
| Households receiving SNAP | 22.7% ±8.5 pts | 17.3% |
| Households with a computer | 95.7% ±3.0 pts | 97.1% |
| Households with a broadband subscription | 95.1% ±3.0 pts | 91.5% |
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 Census Tract 4105?
Owners occupy 49.1% of Census Tract 4105's occupied homes and renters 50.9%. The median owner-occupied home is valued at $184,600 by its owner (±$19,459). The median renter pays $1,268 a month including utilities, and 59.2% of renters pay 35% or more of their income on rent.
| Measure | Tract 4105 | Upper Darby Township |
|---|---|---|
| Median home value (owner-occupied) | $184,600 ±$19,459 | $219,100 |
| Median gross rent | $1,268 ±$200 | $1,328 |
| Renters paying 35% or more of income on rent | 59.2% ±16.3 pts | 43.6% |
| Median monthly owner costs, with a mortgage | $1,753 ±$268 | $1,846 |
| Owner-occupied homes | 49.1% ±12.4 pts | 57.5% |
| Renter-occupied homes | 50.9% ±12.4 pts | 42.5% |
| Housing units | 1,799 ±193 | 35,306 |
| Single-family detached homes | 4.2% ±2.5 pts | 22.0% |
| Mobile homes | 0.3% ±0.5 pts | 0.0% |
| Built 2020 or later | 0.0% ±1.8 pts | 0.0% |
| Built 2010 to 2019 | 0.5% ±0.9 pts | 1.1% |
| Built 1939 or earlier | 45.4% ±10.1 pts | 33.4% |
| Households with no vehicle | 25.6% ±9.3 pts | 14.1% |
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 Census Tract 4105 get to work?
41.9% of Census Tract 4105's workers drive alone. The average trip to work takes 28.2 minutes. The unemployment rate in 2020-2024 averaged 10.0%.
| Measure | Tract 4105 | Upper Darby Township |
|---|---|---|
| In the labor force (age 16+) | 67.2% ±6.5 pts | 71.7% |
| Unemployment rate | 10.0% ±5.3 pts | 8.9% |
| Drove alone to work | 41.9% ±8.2 pts | 60.6% |
| Carpooled | 19.0% ±8.9 pts | 7.5% |
| Public transportation | 19.7% ±8.5 pts | 12.9% |
| Walked | 11.4% ±4.9 pts | 3.0% |
| Worked from home | 4.3% ±2.9 pts | 13.4% |
| Mean travel time to work | 28.2 min ±4.0 | 31.5 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
How does Census Tract 4105 compare with the other tracts in Delaware County?
Among Delaware County's tracts with a reliable estimate, Census Tract 4105 ranks as shown below (1 = highest).
| Measure | In Delaware County |
|---|---|
| Population | 42nd of 150 |
| Residents per square mile | 6th of 152 |
| Median household income | 109th of 147 |
| Per capita income | 111th of 149 |
| Median home value | 111th of 147 |
| Median gross rent | 96th of 138 |
| Poverty rate | 23rd of 80 |
| Bachelor's degree or higher | 92nd of 145 |
| Median age | 94th of 150 |
| Owner-occupied share | 122nd of 147 |
The tracts next to it on Delaware County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 4018 | 106th | $65,388±$20,465 · within the margin of this tract |
| Tract 4014.02 | 107th | $64,821±$12,852 · within the margin of this tract |
| Tract 4035.02 | 108th | $64,803±$17,867 · within the margin of this tract |
| Tract 4105 | 109th | $63,355±$11,433 |
| Tract 4038 | 110th | $63,077±$17,968 · within the margin of this tract |
| Tract 4004.02 | 111th | $62,573±$12,090 · within the margin of this tract |
| Tract 4034.02 | 112th | $61,689±$3,960 · within the margin of this tract |
"Within the margin": the two incomes differ by less than their combined 90% margins, so the survey cannot say which is higher and the ranks between them are not firm.
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed
How reliable are the figures for Census Tract 4105?
2 of the 18 figures for Census Tract 4105 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.
A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). 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 · Check it at data.census.gov
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections