Allegheny County (/ ˌælɪˈɡeɪni / AL-ig-AY-nee) is a large urban county in Pennsylvania, United States. As of the 2025 census estimate, the population was 1,225,035, a 2% decrease of 25,543 residents since 2020, making it the state's second-most populous county, after Philadelphia County.

About Allegheny County, Pennsylvania Allegheny County is a county located in the U.S. state of Pennsylvania. It's county seat is Pittsburgh. As per 2020 census, the population of Allegheny County is 1238090 people and population density is square miles. According to the United States Census Bureau, the county has a total area of 745 sq mi (1,930 km2). Allegheny County was established on 1788 ...

Allegheny, county, southwestern Pennsylvania, U.S., consisting of a hilly region on the Allegheny Plateau bounded to the southeast by the Monongahela and Youghiogheny rivers and to the northeast by the Allegheny River. The Ohio, Allegheny, and Monongahela rivers converge in the centre of the county

The best things to see and do in Allegheny County, Pennsylvania. Includes Pittsburgh and surrounding areas in the county.

Recovery to Resilience, PA’s Only National Forest Nature lovers, outdoor enthusiasts, and indeed, all Pennsylvanians, it’s time to party! Pennsylvania’s Allegheny National Forest (ANF) is celebrating its centennial year with a host of special events and activities. Whether you’re into camping, kayaking, canoeing, fishing, hiking, biking, ATVing, dirtbiking, picnicking, horseback riding ...

Providing Western Pennsylvania's best coverage of the latest Allegheny-Kiski Valley news and events.

Allegheny Map The City of Allegheny is located in Allegheny County in the State of Pennsylvania. Find directions to Allegheny, browse local businesses, landmarks, get current traffic estimates, road conditions, and more. The Allegheny time zone is Eastern Daylight Time which is 5 hours behind Coordinated Universal Time (UTC). Nearby cities include Manchester, Kilbuck, North Side, Duquesne ...