Guaira may refer to:
- Guayrá, a former region of the Spanish Empire in what is now modern Paraguay and Brazil
- Guaíra Falls, former waterfalls on the Paraná River along the border between Brazil and Paraguay
Brazil edit
Paraguay edit
- Guairá Department
- Salto del Guairá, Canindeyú Department
Venezuela edit
- La Guaira State
- La Guaira, its capital city
See also edit
- Guiara, a rodent