Allegheny County is located in the southwestern part of Pennsylvania, USA. It is home to the city of Pittsburgh, which serves as the county seat. The county covers an area of approximately 730 square miles and features a mix of urban, suburban, and rural landscapes. The county is known for its rich history, diverse culture, and numerous parks and recreational areas. It is also a hub for education and healthcare, with institutions like Carnegie Mellon University and UPMC contributing to its economy and community services.