Pa or PA may refer to:

• Pâ, a town in Burkina Faso
• Pâ Department, a department in Burkina Faso
• PA postcode area, in Scotland
• Province of Palermo, Italy
• Palo Alto, California
• Panama, ISO country code
  • .pa, the country code top level domain (ccTLD) for Panama
• Pará, Brazil (postal code)
• Pennsylvania, United States (postal abbreviation)
• Port Arthur (disambiguation), several places
• Prince Albert, Saskatchewan, Canada

Pâ is a town in the Pâ Department of Balé Province in south-western Burkina Faso. The town has a population of 8649 and it is the capital of Pâ Department.

.pa is the Internet country code top-level domain (ccTLD) for Panama, administered by NIC-Panama.

The word pa (IPA ) can refer to any Maori village or settlement, but in traditional use it referred to hillforts fortified with palisades and defensive terraces and also to fortified villages. They first came into being about 1450. They are located mainly in the North Island north of Lake Taupo. There were no pa during the early Archaic period when most Maori lived in the lower South Island. Similar hill forts were common in the Marquesas Islands and in Tonga in particular.

Pennsylvania , officially the Commonwealth of Pennsylvania, is a US state that is located in the Northeastern and Mid-Atlantic regions of the United States, and the Great Lakes Region. The state borders Delaware to the southeast, Maryland to the south, West Virginia to the southwest, Ohio to the west, Ontario, Canada to the northwest, New York to the north, and New Jersey to the east.