Barreira or Barreiras (Portuguese meaning "barrier" and "barriers", respectively) might refer to:
People Luís Barreira, a Portuguese mathematician
Places
Brazil Barreira, Ceará Barreiras, Bahia Barreiras Airport Barreiras do Piauí, Piauí
Portugal
Barreiras, a village in Peral, Cadaval, Lisbon District
Other uses
Barreira do Inferno Launch Center, also referred to as Barreira do Inferno, a Brazilian rocket launch base Barreira Megalithic Complex, a Portuguese megalithic site Barreiras Formation or Barreiras Group, a geological formation along the Brazilian coast