Pia or Piá may refer to:

  • Pia, Polynesian arrowroot
  • Pia (band), a Korean rock band
  • Pia Carry, a lifesaving technique
  • Pia (name), a given name
  • Pia, France, a French commune
  • Pia, Iran, a village in Razavi Khorasan Province, Iran
  • Pia mater, a layer of the meninges in the brain
  • Piá (footballer born 1982), full name João Batista Inácio, a Brazilian football player
  • Piá (footballer born 1973), a Brazilian football player
  • Pia Toscano, a finalist on the tenth season of American Idol
  • 614 Pia, a minor planet orbiting the Sun
  • Pakistan International Airlines, the flag carrier of Pakistan
  • PIA is the IATA code for the General Wayne A. Downing Peoria International Airport in Peoria, Illinois.