Township · Pennsylvania
Londonderry Township, Dauphin County, Pennsylvania
Londonderry Township, Dauphin County, township, in Dauphin County, Pennsylvania. Londonderry Township, Dauphin County had 4,925 residents on July 1, 2025 by the Census Bureau's estimate, up 0.6% since 2020; the 2020 Census counted 4,899 and the ACS 2020-2024 5-year estimates put it at 4,906 (±17). GEOID 4204344464.
Residents, July 2025 estimate
4,925
Census Bureau estimate (no margin published)
2020 Census count: 4,899 · ACS 2020-2024: 4,906 ±17
Median household income
$91,905
±$15,181 (90% margin)
Pennsylvania: $77,971
Median home value
$241,700
±$30,457 (90% margin)
Pennsylvania: $254,500
Median gross rent
$1,188
±$318 (90% margin)
Pennsylvania: $1,209
Where is Londonderry Township, Dauphin County and what county is it in?
Londonderry Township, Dauphin County is a township in Dauphin County, Pennsylvania. It covers 22.8 square miles of land, 215 residents per square mile in 2020.
Londonderry Township, Dauphin County is in the Harrisburg-Carlisle, PA metropolitan statistical area, which takes in 3 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 Londonderry Township, Dauphin County, and is it growing?
The Census Bureau estimates that 4,925 people lived in Londonderry Township, Dauphin County on July 1, 2025, up 0.6% since 2020, in line with Pennsylvania (+0.4%). The 2020 Census counted 4,899 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 4,906 (±17).
| Measure | Londonderry Township, Dauphin County | Dauphin County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 4,906±17 | 289,593 | −322 |
| Households | 1,864±205 | 121,358 | −333 |
| Average household size | 2.63±0.28 | 2.33 | no clear change |
| Housing units | 1,975±224 | 127,828 | −370 |
Londonderry Township, Dauphin County's population since 2000
From 5,224 in 2000 to 4,925 in 2025: down 5.7%. The 2000, 2010 and 2020 figures are census counts, each for Londonderry Township, Dauphin County 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 Londonderry Township, Dauphin County?
The median resident of Londonderry Township, Dauphin County is 40.5 years old; 29.0% are under 18 and 17.1% are 65 or older. The largest group is non-Hispanic white residents at 83.0%, then Hispanic or Latino residents (of any race) at 10.9%.
| Measure | Londonderry Township, Dauphin County | Dauphin County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 40.5±4.9 | 39.4 | −7.9 |
| Under 18 years | 29.0%±5.7 pts | 22.3% | – |
| 65 years and over | 17.1%±3.3 pts | 18.0% | – |
| Male | 50.9%±3.8 pts | 48.8% | – |
| Hispanic or Latino (any race) | 10.9%±8.3 pts | 11.8% | – |
| White alone, not Hispanic | 83.0%±8.7 pts | 60.6% | no clear change |
| Black or African American alone, not Hispanic | 3.9%±3.2 pts | 16.3% | – |
| Asian alone, not Hispanic | 0.4%±0.6 pts | 6.5% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±0.7 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 | 1.8%±1.1 pts | 4.1% | – |
| Some other race alone, not Hispanic | 0.0%±0.7 pts | 0.6% | – |
| Born outside the United States | 1.0%±1.4 pts | 9.8% | – |
| Speak a language other than English at home (age 5+) | 3.0%±2.9 pts | 14.8% | – |
| Civilian veterans (age 18+) | 7.4%±3.9 pts | 6.6% | – |
| With a disability | 12.8%±5.2 pts | 14.0% | – |
| No health insurance coverage | 0.7%±0.8 pts | 6.4% | – |
| High school graduate or higher (age 25+) | 96.3%±2.4 pts | 91.2% | – |
| Bachelor's degree or higher (age 25+) | 25.6%±8.1 pts | 34.4% | +10.7 pts |
| Graduate or professional degree (age 25+) | 6.5%±4.2 pts | 12.8% | – |
| Lived in the same house a year earlier | 96.3%±2.7 pts | 87.6% | – |
| Moved from another state in the past year | 0.0%±0.7 pts | 2.0% | – |
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 Londonderry Township, Dauphin County earn?
Half of Londonderry Township, Dauphin County's 1,864 households earn less than $91,905 a year (±$15,181), against $76,242 in Dauphin County and $77,971 in Pennsylvania. In 2015-2019 it was $81,707 in 2024 dollars; the margins of error cannot tell the two periods apart. 8.9% of residents live below the poverty line.
| Measure | Londonderry Township, Dauphin County | Dauphin County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $91,905±$15,181 | $76,242 | no clear change |
| Mean household income | $96,450±$9,791 | $101,339 | – |
| Per capita income | $37,022±$4,541 | $42,294 | no clear change |
| People below the poverty line | 8.9%±5.7 pts | 12.9% | – |
| Children under 18 below the poverty line | 16.4%±12.8 pts | 16.7% | – |
| Households receiving SNAP | 3.6%±2.9 pts | 13.3% | – |
| Households with a computer | 92.0%±6.1 pts | 94.0% | – |
| Households with a broadband subscription | 90.9%±6.2 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 Londonderry Township, Dauphin County?
Owners occupy 91.8% of Londonderry Township, Dauphin County's occupied homes and renters 8.2%. The median owner-occupied home is valued at $241,700 by its owner (±$30,457). The median renter pays $1,188 a month including utilities, and 60.6% of renters pay 35% or more of their income on rent.
| Measure | Londonderry Township, Dauphin County | Dauphin County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $241,700±$30,457 | $236,400 | +$63,865 |
| Median gross rent | $1,188±$318 | $1,217 | no clear change |
| Renters paying 35% or more of income on rent | 60.6%±35.3 pts | 37.8% | – |
| Median monthly owner costs, with a mortgage | $1,724±$149 | $1,660 | – |
| Owner-occupied homes | 91.8%±4.3 pts | 63.1% | no clear change |
| Renter-occupied homes | 8.2%±4.3 pts | 36.9% | – |
| Housing units | 1,975±224 | 127,828 | −370 |
| Homeowner vacancy rate | 0.0%±1.9 pts | 0.7% | – |
| Rental vacancy rate | 0.0%±19.0 pts | 4.2% | – |
| Single-family detached homes | 81.6%±6.8 pts | 49.5% | – |
| Mobile homes | 14.9%±6.9 pts | 2.6% | – |
| Built 2020 or later | 0.0%±1.6 pts | 1.2% | – |
| Built 2010 to 2019 | 5.9%±4.7 pts | 6.3% | – |
| Built 1939 or earlier | 5.8%±3.6 pts | 19.1% | – |
| Households with no vehicle | 0.0%±1.7 pts | 9.4% | – |
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 Londonderry Township, Dauphin County building?
Builders took permits for 4 new housing units in Londonderry Township, Dauphin County in 2025 (4 in single-family houses), 0.8 per 1,000 residents against 2.0 across Pennsylvania.
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 Londonderry Township, Dauphin County work and get to work?
74.5% of Londonderry Township, Dauphin County's workers drive alone and 16.4% work from home. The average trip to work takes 23.6 minutes.
| Measure | Londonderry Township, Dauphin County | Dauphin County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 69.4%±5.9 pts | 64.6% | – |
| Unemployment rate | 0.0%±1.3 pts | 4.5% | – |
| Drove alone to work | 74.5%±6.6 pts | 68.5% | – |
| Carpooled | 3.1%±2.7 pts | 8.2% | – |
| Public transportation | 0.8%±1.3 pts | 1.3% | – |
| Walked | 3.6%±3.2 pts | 2.8% | – |
| Worked from home | 16.4%±6.1 pts | 16.8% | – |
| Mean travel time to work | 23.6 min±5.8 | 21.5 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 Londonderry Township, Dauphin County?
1 census tract lies mostly in Londonderry Township, Dauphin County (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 240.01Dauphin County | 5,847 | $88,500 |
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 Londonderry Township, Dauphin County) · Census block assignment files
How does Londonderry Township, Dauphin County compare with other places in Pennsylvania?
By the Census Bureau's July 2025 estimates, Londonderry Township, Dauphin County is the 2,336th-most populous of the 16,079 U.S. towns and townships that have one and the 379th-most populous of 1,542 in Pennsylvania.
Londonderry Township, Dauphin County ranks 607th of 2,136 places in Pennsylvania with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 379th | 1,542 |
| Growth 2020-2025 (PEP) | 685th | 1,764 |
| Residents per square mile | 1,408th | 2,159 |
| Median household income | 607th | 2,136 |
| Per capita income | 1,291st | 2,157 |
| Median home value | 900th | 2,146 |
| Median gross rent | 693rd | 1,963 |
| Poverty rate | 857th | 1,606 |
| Bachelor's degree or higher | 1,059th | 2,129 |
| Median age | 1,527th | 2,157 |
| Owner-occupied share | 260th | 2,149 |
| Work from home | 494th | 1,710 |
| Travel time to work | 1,445th | 2,156 |
Londonderry Township, Dauphin County's figures with every place in Pennsylvania (CSV)
Every place in Pennsylvania, sortable · Compare Londonderry Township, Dauphin County 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 Londonderry Township, Dauphin County?
21 of the 57 figures for Londonderry Township, Dauphin County 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 Londonderry Township, Dauphin County 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.