PA1

PA1 or PA-1 may refer to:

• Pad Abort Test 1, a 1963 Apollo test flight
• Pad Abort 1 (Orion), a 2010 Orion test flight
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• Pennsylvania state route 1, a former state highway near Philadelphia
• U.S. Route 1 in Pennsylvania
• Muhammed Akbar Khan, Pakistan Army general
• ALCO PA, train locomotive
• The PA1, a type of rolling stock used on the PATH train in New York and New Jersey
• PA-1 (cell line), a human ovarian cancer cell line
• PA1 key, on the IBM 3270 keyboard