Londonderry Flag

Londonderry

County:
Dauphin County
County Seat:
No
Area (mi²):
22.76
State:
Pennsylvania

Londonderry is located in Dauphin County, Pennsylvania. Londonderry has a 2025 population of 4,936 . Londonderry is currently growing at a rate of 0.24% annually and its population has increased by 0.78% since the most recent census, which recorded a population of 4,898 in 2020.

The average household income in Londonderry is $103,432 with a poverty rate of 4.33%. The median age in Londonderry is 39.6 years: 40.4 years for males, and 38.3 years for females. For every 100 females there are 105.8 males.

4.9K
Total Population
217
Density (mi²)
12 0.24%
Growth

Londonderry Population

Londonderry Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Londonderry includes 81.04% White, 7.58% other race, and smaller percentages for Black or African American and multiracial populations.

Population by Race

White (81.04%)

Two or more races (10.81%)

Other race (7.58%)

Black or African American (0.57%)

Race
Population
Percentage (of total)
White3,96781.04%
Two or more races52910.81%
Other race3717.58%
Black or African American280.57%

Londonderry Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Londonderry's average per capita income is $49,556. Household income levels show a median of $84,699. The poverty rate stands at 4.33%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$103,438-
Families$100,268$121,186
Households$84,699$103,432
Non Families$44,080$58,343

$49,556

Average Income

$84,699

Median Household Income

4.33%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)