About Allegheny County
Allegheny County is a large city located in United States, in the Pennsylvania region. According to the latest available data (2026), the population of Allegheny County is approximately 1,250,578 residents, making it the #41 most populous city in United States.
Globally, Allegheny County ranks #1,404 among the world's most populated cities. With over 1 million residents, Allegheny County plays an important role as an economic and cultural center in United States.
Allegheny County City Statistics
| City | Allegheny County |
| Country |  United States |
| Population | 1,250,578 |
| Global Rank | #1,404 |
| Rank in United States | #41 of 867 cities |
| City Category | large city |
| Region | Pennsylvania |
| Latitude | 40.4688 |
| Longitude | -79.9812 |
| Data Year | 2026 |
Population Comparison
To put Allegheny County's population of 1,250,578 into perspective:
- Allegheny County has approximately 1.3 million residents.
- This makes it comparable in size to cities like Prague or Munich.
Where is Allegheny County Located?
Allegheny County is located in United States, in the Pennsylvania region, at coordinates 40.4688° latitude and -79.9812° longitude. Located in the mid-latitudes, Allegheny County experiences distinct four-season weather patterns.
Nearby Cities
Other Cities in United States
Largest Cities in United States
| # | City | Population |
|---|---|---|
| 1 | Harris County | 4,731,145 |
| 2 | Los Angeles | 3,898,747 |
| 3 | San Diego County | 3,298,634 |
| 4 | Brooklyn | 2,736,074 |
| 5 | Miami-Dade County | 2,701,767 |
Frequently Asked Questions
What is the population of Allegheny County?
The population of Allegheny County is approximately 1,250,578 residents according to the latest available data (2026).
Where is Allegheny County located?
Allegheny County is located in United States at approximately 40.4688° latitude and -79.9812° longitude.
Is Allegheny County one of the largest cities in United States?
With a population of 1,250,578, Allegheny County is one of the major urban areas in United States. It ranks #41 out of 867 cities in the country.
