Pennsylvania's most populous city is Philadelphia, and the state capital is Harrisburg. Pennsylvania is the fifth-most populous state in the country, with over 13 million residents as of the 2020 United States census. Pennsylvania has the ninth-highest by population density, and is the 33rd-largest by land area.

Local, state, and federal government websites often end in .gov. Commonwealth of Pennsylvania government websites and email systems use "pennsylvania.gov" or "pa.gov" at the end of the address. Before sharing sensitive or personal information, make sure you're on an official state website.

Physical map of Pennsylvania showing major cities, terrain, national parks, rivers, and surrounding countries with international borders and outline maps. Key facts about Pennsylvania.

Pennsylvania, constituent state of the U.S., one of the original 13 American colonies. It is bounded to the north by Lake Erie and New York; to the east by New York and New Jersey; to the south by Delaware, Maryland, and West Virginia, and to the west by West Virginia and Ohio. Its capital is Harrisburg.

Pennsylvania is the perfect place for action-filled adventures or to unwind and do absolutely nothing. Get away from the hustle – without ever going too far.

Find information and services for Pennsylvania residents, businesses, and visitors, including state government, agencies, officials, and local governments.

Pennsylvania (PA) lies in the eastern United States, the state has a very rich history including an important role in the nation’s founding. At Independence Hall in Philadelphia, on , the United States Declaration of Independence was formally signed, and in 1863 the pivotal Battle of Gettysburg took place in southern Pennsylvania. The state’s economy relies on services, steel ...