Allegheny County GIS Maps

Allegheny County Maps

The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.

County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.

Allegheny County Parcels

Allegheny County has 584,965 mapped parcels covering 423,471 acres. The median lot size is 0.15 acres. 14,334 parcels are 10 acres or larger. Lot sizes are on nearly every parcel. Browse the interactive Allegheny County Parcel viewer here.

Allegheny County Parcel Data Coverage

Field coverage measured across all Allegheny County parcel records. Download free sample data here.

Allegheny County Population

Allegheny County had 1,250,578 residents in 2020. That was 2.2% higher than in 2010. Allegheny County had 31,088 fewer people in 2020 than it did in 2000, which points to a long-term population decline. Pittsburgh is the largest city in the county, but it accounts for only about 24% of the total population. The county is fairly spread out, with about 1,713 people per square mile. Some of the county's most populated postal areas include Pittsburgh, Coraopolis and Pittsburgh.

Population Trend in Allegheny County PA

Allegheny County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.

Allegheny County Zip Codes

Allegheny County has 103 zip codes. Some of the county's most populated zip codes include Pittsburgh (15237), Coraopolis (15108) and Pittsburgh (15235). Pittsburgh is the largest zip by population, with about 45,670 residents or 4% of the county total. Together, the three largest zips account for about 10% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Allegheny County PA

Allegheny County Zip Code populations and trends per most recent census data.

Allegheny County Demographics

Allegheny County has a median age of 40.6, which is close to the Pennsylvania average. About 18.7% of residents are under 18, while 19.7% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 33.3% of the population, which points to a solid working-age base. About 44.8% of adults have a bachelor's degree or higher, above the statewide figure of 34.5%. The county is majority White by population, with Hispanic, Asian, Black and multiracial residents making up a meaningful share of the local mix.

Key Demographics for Allegheny County PA

Allegheny County School Districts

Allegheny County is served by 44 public school districts with 133,287 students enrolled in 2024. The largest districts on the county map are Pittsburgh, North Allegheny and Mount Lebanon. Those three districts account for about 25% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, based on district totals from 2017 to 2024.

Largest School Districts by Enrollment in Allegheny County PA

Allegheny County school district enrollment and trends per most recent NCES reporting data.

Allegheny County Housing & Real Estate

Allegheny County has a median home value of $216,700 and a median gross rent of $1,111. About 65% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Pennsylvania median, while rents come in below the state average. In March 2026, the median listing price was $250,000 and homes spent about 63 days on the market.

Businesses in Allegheny County, PA

Allegheny County has 56,978 business listings across 1,278 categories. The largest categories in Allegheny County business listings are Medical Offices (1,146, 2.0%), Churches & Religious Organizations (1,064, 1.9%), and Community & Nonprofits (780, 1.4%). The full Allegheny County business listings dataset includes names, categories, addresses and contact details where available. Allegheny County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Allegheny County, PA

Allegheny County Business Listings

Allegheny County business listings sourced from Overture Maps. Includes locations with a high level of confidence.

Allegheny County Basemaps

Allegheny County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.

Preview a Live Package Demo

See exactly what is included in a county data package. Inspect how files are organized, the interactive data explorer and how maps and analytics are laid out. The demo loads a real sample package from Pennsylvania — explore the full structure before you buy.