PA2

PA2 may refer to:
 * ALCO PA-2, a diesel locomotive
 * French aircraft carrier PA2 (French: Porte-avion 2; aircraft carrier 2), a cancelled ship of the French Navy
 * Pad Abort Test 2, an Apollo program mission
 * Paranormal Activity 2, a 2010 American supernatural horror film
 * Pennsylvania's 2nd congressional district
 * Pennsylvania Route 2, a former state route in Pennsylvania
 * Pitcairn PA-2 Sesquiwing, a biplane
 * The PA2, a type of rolling stock used on the PATH train in New York and New Jersey
 * PA2 key, on the IBM 3270 keyboard