Garreta or Garréta is a surname and a given name. Notable people with the name include:
Surname Anne F. Garréta, French novelist Félix Garreta (born 2004), Spanish footballer Juli Garreta (1875–1925), Spanish composer Raimundo de Madrazo y Garreta (1841–1920), Spanish painter
Given name Garreta Busey (1893–1976), American academic, writer, and banker