Is Pittsburgh an American city or not?

Pittsburgh is an American city. It is located in the state of Pennsylvania in the United States. Pittsburgh is the second-most populous city in Pennsylvania, after Philadelphia, and the 23rd-most populous city in the United States. The city has a population of about 305,000 people. Pittsburgh is known for its steel industry and its many bridges, which have earned it the nickname "Steel City" and "City of Bridges".