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Buying in Allegheny County, Pennsylvania

Allegheny County is one of 67 counties and county-equivalents in Pennsylvania. Its county seat is Pittsburgh. County government publishes its offices and parcel tools online. (Official county website: https://www.alleghenycounty.us/Home) With a 2024 Census Bureau population estimate of 1,231,814, it is the second most populous county in Pennsylvania. In the FBI's 2024 reported-crime file, agencies here reported 21,064 offenses — 17.1 per 1,000 residents; the breakdown is below.

State
Pennsylvania
County seat
Pittsburgh
Population (2024 est.)
1,231,814
Land area
730.1 sq mi
County FIPS
42003

Allegheny County at a glance

Allegheny County is one of 67 counties and county-equivalents in Pennsylvania. Its county seat is Pittsburgh. County government publishes its offices and parcel tools online. Official county website. With a 2024 Census Bureau population estimate of 1,231,814, it is the second most populous county in Pennsylvania. In the FBI's 2024 reported-crime file, agencies here reported 21,064 offenses — 17.1 per 1,000 residents; the breakdown is below.

Records to check before you buy in Allegheny County

  • Property record card — the Allegheny County assessor / appraisal office. Pull the parcel's assessed-value history, exemption status, and last sale. This is the file your future tax bill is calculated from, and it shows whether the current owner is enjoying exemptions you will not inherit. County government sits in Pittsburgh; the official county website is the reliable route to the parcel search and the office directory.
  • Deeds & liens — the Allegheny County recorder / land-records office. Read the deed chain, open liens, easements, and plat maps — the file a listing never mentions.
  • Official flood determination. Check the exact parcel on FEMA's National Flood Hazard Layer — not the listing site's licensed model. Zone boundaries cut through streets; the house next door can be in a different zone. Allegheny County is the primary county for 103 ZIP codes in the Census Bureau's ZIP-to-county crosswalk — and zone lines ignore every one of them.
  • The county's reported-crime record. In the FBI's 2024 file, agencies in Allegheny County reported 21,064 offenses — 17.1 per 1,000 residents; the largest single category was larceny-theft (14,054). The crime section below sets that beside the Pennsylvania county median.
  • Registry check. Run the address through Pennsylvania Megan's Law Website (Pennsylvania State Police) and note the counts within a mile — then check again the week you close.
  • Permits & code history — the Allegheny building department. Open permits, expired permits, and code cases tell you whether the renovation in the photos was ever inspected. County permitting is run out of Pittsburgh.
  • School assignment — the district office, not the listing. Only the district's own boundary lookup confirms which school an address is actually zoned for.

County list, land area and population: U.S. Census Bureau (population: 2024 PEP estimate). County seat and official website: Wikidata (CC0), checked 2026-11-04. Flood determinations: FEMA. Registry: Pennsylvania.

Reported crime in Allegheny County — FBI 2024

Agencies in Allegheny County reported 21,064 offenses to the FBI in 2024 — 3,511 violent and 17,553 property offenses. That works out to a reported-crime rate of 17.1 per 1,000 residents (violent 285.0, property 1425.0 per 100,000).

Inside Pennsylvania, the median county in the same file recorded a violent-crime rate of 138 per 100,000 and a property-crime rate of 777 per 100,000 (medians computed from the FBI 2024 county file across 67 counties).

The largest reported categories were larceny-theft (14,054), aggravated assault (2,243) and motor vehicle theft (1,924).

Coverage: 124 of 124 law-enforcement agencies assigned to this county reported at least one month of 2024 offense data to the FBI; 114 reported all 12 months. Counts are reported offenses only (FBI Return A / Arson master files), assigned whole to each agency's primary county; they are not adjusted for non-reporting agencies.

These are offenses reported to law enforcement — not convictions, and not a verdict on any street or address. A CurbFacts report pairs this county record with the ZIP-level picture for the specific address you are buying.

Source: FBI Crime Data Explorer, UCR Return A + Arson master files, data year 2024 (pulled 2026-11-04).

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ZIP guides in Allegheny County

Registry counts and county crime records for the 91 ZIP codes whose primary county is Allegheny County.

15014 — Brackenridge15017 — Bridgeville15018 — Allegheny County15020 — Allegheny County15024 — Russellton15025 — Jefferson Hills15030 — Allegheny County15031 — Allegheny County15034 — Dravosburg15035 — East McKeesport15037 — Lincoln15044 — Gibsonia15045 — Glassport15046 — Allegheny County15047 — Greenock15049 — Harwick15056 — Leetsdale15064 — Allegheny County15065 — Allegheny County15071 — Noblestown15076 — Russellton15084 — Curtisville15086 — Fernway15088 — West Elizabeth15090 — Franklin Park15101 — Allison Park15102 — Bethel Park15104 — North Braddock15106 — Carnegie15108 — Carnot-Moon15110 — Duquesne15112 — East Pittsburgh15116 — Glenshaw15120 — Munhall15122 — West Mifflin15126 — Imperial15129 — South Park Township15131 — White Oak15132 — McKeesport15133 — Liberty15135 — Greenock15136 — McKees Rocks15137 — White Oak15139 — Oakmont15140 — Pitcairn15142 — Allegheny County15143 — Franklin Park15144 — Springdale15145 — Turtle Creek15146 — Monroeville15147 — Plum15148 — Wall15201 — Pittsburgh15202 — Bellevue15203 — Pittsburgh15204 — Pittsburgh15205 — Pittsburgh15206 — Pittsburgh15207 — Pittsburgh15208 — Pittsburgh15209 — Millvale15210 — Pittsburgh15211 — Pittsburgh15212 — Pittsburgh15213 — Pittsburgh15214 — Pittsburgh15215 — Fox Chapel15216 — Pittsburgh15217 — Pittsburgh15218 — Swissvale15219 — Pittsburgh15220 — Pittsburgh15221 — Wilkinsburg15222 — Pittsburgh15223 — Etna15224 — Pittsburgh15225 — Allegheny County15226 — Pittsburgh15227 — Baldwin15228 — Upper St. Clair15229 — West View15232 — Pittsburgh15233 — Pittsburgh15234 — Castle Shannon15235 — Churchill15236 — Baldwin15237 — Franklin Park15238 — Fox Chapel15239 — Plum15241 — Upper St. Clair15243 — Upper St. Clair

The Pennsylvania rules that apply in Allegheny County

Disclosure form
Seller's Property Disclosure Statement
Flood disclosure
Required by state law
Tax reset at sale
No
Reassessment cycle
county-set base-year system; no state law requires

Traps researched for Pennsylvania buyers: School districts can appeal a recently sold, underassessed home; Expanded flood disclosure not required until July 2028.

Read the full Pennsylvania guide — disclosure standard, tax math, registry and flood

More Pennsylvania counties

Adams CountyArmstrong CountyBeaver CountyBedford CountyBerks County

All Pennsylvania counties · Pennsylvania buyer guide

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