PACI

PACI may refer to:


 * Chalkyitsik Airport (ICAO location indicator: PACI), in Chalkyitsik, Alaska, United States
 * Pacific AC Intertie, see also Path 15
 * Partnering Against Corruption Initiative (PACI), a global anti-corruption and compliance platform organized by the World Economic Forum
 * Partial anterior circulation infarct, a type of ischemic stroke
 * Port Arthur Collegiate Institute, a former high school in Thunder Bay, Ontario, Canada