350,935 people (2024 Census estimate, −1.0% since 2020)
1,028 square miles of land · 341 people per square mile
“Highest” and “lowest” are just order, not grades: a high rank for poverty or hazard losses means more of it. Each figure's source is in its section below.
17 active community water systems list Westmoreland County in the area they serve, reporting 254,521 people served in all (a system that crosses county lines counts its whole population).
| MAWC SWEENEY PLANT surface water · local government · PA5650032 | 143,000 served |
| NEW KENSINGTON MUNI AUTH surface water · local government · PA5650070 | 47,800 served |
| LATROBE MUNI AUTH surface water · local government · PA5650060 | 30,000 served |
| HIGHRIDGE WATER AUTH surface water · local government · PA5650069 | 16,000 served |
| DERRY BORO MUNI AUTH surface water · local government · PA5650049 | 6,500 served |
| LIGONIER TWP MUNI AUTH surface water · local government · PA5650080 | 3,293 served |
| MAWC FURNACE RUN buys surface water · local government · PA5650031 | 3,100 served |
| YOUNGSTOWN BORO MUNI AUTH buys surface water · local government · PA5650081 | 2,730 served |
Source: U.S. EPA Safe Drinking Water Information System (SDWIS), active community systems, . Look up any system's violations and test results with EPA's search using its ID.
About 520 people were held in Westmoreland County's jail, in Vera's latest figure (2023), or 244 per 100,000 residents ages 15–64. In 2018 it was about 626.
Source: Vera Institute of Justice, Incarceration Trends (built from federal Bureau of Justice Statistics jail surveys). Counties without their own jail, or that share one, may show no figure.
17 school districts have their office in Westmoreland County. School taxes are usually the largest part of a property tax bill.
Spent $110.1 million — $92.8 million to run schools, about $17,868 per student, plus $6.9 million on buildings and equipment. Money in: $67.5 million local (mostly property tax), $38.9 million state, $5.1 million federal. Long-term debt: $142.1 million.
Spent $91 million — $77 million to run schools, about $15,260 per student, plus $8 million on buildings and equipment. Money in: $47.8 million local (mostly property tax), $34.6 million state, $4.1 million federal. Long-term debt: $89.5 million.
Spent $66.8 million — $61.8 million to run schools, about $15,927 per student, plus $2 million on buildings and equipment. Money in: $37.5 million local (mostly property tax), $28.6 million state, $2.5 million federal. Long-term debt: $23.6 million.
Spent $69 million — $57 million to run schools, about $16,417 per student, plus $4.8 million on buildings and equipment. Money in: $39.1 million local (mostly property tax), $23.7 million state, $6.7 million federal. Long-term debt: $28 million.
Spent $65.6 million — $58.4 million to run schools, about $17,262 per student, plus $1 million on buildings and equipment. Money in: $28.9 million local (mostly property tax), $32.4 million state, $6.4 million federal. Long-term debt: $43.1 million.
Spent $64.8 million — $59.9 million to run schools, about $17,777 per student, plus $1.5 million on buildings and equipment. Money in: $47 million local (mostly property tax), $18.9 million state, $1.5 million federal. Long-term debt: $53.5 million.
Spent $50.5 million — $45.6 million to run schools, about $17,724 per student, plus $2.2 million on buildings and equipment. Money in: $26.2 million local (mostly property tax), $21.6 million state, $7 million federal. Long-term debt: $8.4 million.
Spent $44.3 million — $37.8 million to run schools, about $15,970 per student, plus $3.4 million on buildings and equipment. Money in: $22.1 million local (mostly property tax), $19.8 million state, $4.8 million federal. Long-term debt: $37.7 million.
And 9 more.
Source: U.S. Census Bureau, 2023 Annual Survey of School System Finances. Districts are listed by the county of their main office; some serve neighboring counties too.
Source: County Health Rankings & Roadmaps 2025 (University of Wisconsin Population Health Institute), which gathers federal data (CDC, Census, and others); measures cover different recent years. Blank lines aren't reported for small counties.
Overall risk: Relatively Moderate compared with other U.S. counties. FEMA estimates natural hazards cost Westmoreland County about $76.3 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Relatively Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
618 bridges in Westmoreland County: 230 in good condition, 291 fair, and 97 poor (15.7%). “Poor” means a main part — the deck, the beams, or the supports — is rated 4 or lower on the federal 0–9 scale. It doesn't mean unsafe to drive; unsafe bridges are closed.
| PA TPK (I-76) over SR 0993 BRUSH CK. & RR · built 1952 | 44,987 vehicles a day |
| SR 0981 over MONASTERY RUN · built 1953 | 10,217 vehicles a day |
| OLD WILL PENN HIGH over TURTLE CREEK · built 1982 | 10,000 vehicles a day |
| SR 4035 over LYONS RUN · built 1952 | 9,150 vehicles a day |
| SR 0981 over REPKO RUN · built 1947 | 8,006 vehicles a day |
| CENTER HIGHWAY over TINKER RUN · built 1979 | 6,600 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $259.7 million of work in Westmoreland County in fiscal 2025, about $732 per resident — to the county, cities, schools, hospitals, nonprofits and others.
Source: USAspending.gov, grants by place of performance, fiscal 2025 (Oct. 2024 to Sept. 2025). Search it by county to see each award.
From Grants.gov: posted grants listing county governments as eligible, soonest deadline first; research-only and overseas programs left out; list updated 2026-10-13, refreshed weekly. 62 are open in all. Cities, towns, school districts and nonprofits have their own lists there.
Registration deadlines, early voting and polling places for Pennsylvania are on the federal site vote.gov, which links to the state's official election office.
The budget, property tax rates, audits, local officials and offices for Westmoreland County come from the county's own records, which we haven't gathered — not gathered, never hidden. See what a full county site looks like, or ask to have Westmoreland County built: brayden.ozark@gmail.com.
More of Pennsylvania: the state government and every county in Pennsylvania.
Nearby counties: Fayette County (29 mi) · Allegheny County (29 mi) · Indiana County (31 mi) · Somerset County (32 mi) · Armstrong County (35 mi) · Washington County (42 mi).