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Derry, Westmoreland County, Pennsylvania

Borough in Westmoreland County, Pennsylvania · ZIP 15627

  • Westmoreland County
  • Census data · ACS 2019-2023
Join DerryAsk DerryBusinessesPeople
  • 2,583 (2024 estimate)Population
  • 1,181Households
  • $49,051Median household income
  • $122,200Median home value
  • 1ZIP codes

About Derry

This page shows only what has been published about Derry: Census facts with their sources first, then its businesses, jobs, events, people in public roles, housing and questions as they are added. Nothing here is written by the town government.

Town intelligenceOfficial sources, refreshed yearly

Population, 2000 to 2020−11.8%
2.6k2.8k3k2000: 2,99120002010: 2,68820102020: 2,63920202,9912,639
Population of Derry at each census
CensusPopulation
20002,991
20102,688
20202,639

As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.

Sources: Census 2000 Summary File 1: total population, place level, state 42, retrieved November 14, 2026; Census 2010 Summary File 1: total population, place level, state 42, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, place level, state 42, retrieved November 14, 2026.

Household income in Derry
Under $50k51.8%
$50k to $100k27%
$100k to $150k14.6%
$150k to $200k4.6%
$200k and over2.2%

Median household income $49,051 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.

Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, place level, state 42, retrieved November 14, 2026.

Housing tenure in Derry
Owner occupied
829 units
Renter occupied
352 units
Vacancy rate
15.4%

Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.

Source: American Community Survey 5-year data profile 2019–2023, place level, state 42, retrieved November 14, 2026.

Derry compared with its county and state
Derry compared with its county and state, American Community Survey 2019-2023
MeasureDerryWestmoreland CountyPennsylvania
Population2,616353,34512,986,518
Median household income$49,051$72,468$76,081
Median age42.147.140.9
Median home value$122,200$193,100$240,500
Bachelor’s degree or higher16.1%31.8%34.5%
Foreign-born residents0.2%1.8%7.4%
Owner-occupied homes70.2%78.3%69.3%
Mean commute to work25.4 minutes27.1 minutes26.6 minutes

Source: American Community Survey 5-year data profile 2019–2023, place level, state 42, retrieved November 14, 2026.

CommunityRules and moderation

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Schools

No public school is listed for Derry: either the NCES directory for Pennsylvania is not loaded yet, or no school's address falls inside Derry’s boundary. Schools in neighbouring towns are on their pages.

Legislative districts

Legislative districts for Derry3
Congressional and state legislative districts for Derry
ChamberDistrict
U.S. House of RepresentativesCongressional District 14 (PA-14)
State legislature, lower chamberState House District 59
State legislature, upper chamberState Senate District 41

Boundaries from the Census Bureau’s TIGER/Line district files, matched to Derry’s own boundary. Who holds each seat appears on the People page once the official records are approved.

Sources: Census cartographic boundaries 2025: congressional districts, 119th Congress, retrieved November 14, 2026; Census cartographic boundaries 2025: state legislative districts, upper chamber, state 42, retrieved November 14, 2026; Census cartographic boundaries 2025: state legislative districts, lower chamber, state 42, retrieved November 14, 2026.

Frequently asked about DerryPromoted from questions people asked

No question about Derry has been asked often enough to publish an answer yet. Ask Derry and the answer, once a person checks it, appears here.

Nearby towns

Other towns in Westmoreland County

All towns in Westmoreland County

Other places named Derry in Pennsylvania