Alianza may refer to:
- Alianza Petrolera, Colombia
- Alianza Atlético, Peru
- Alianza Huánuco, Peru
- Alianza Lima, Peru
- Alianza F.C., El Salvador
- Alianza F.C., Panama
- Alianza (barangay) in Bago City, Philippines
- Alianza (band)
- Alianza (album)
- Alianza Puertorriqueña, a defunct political party in Puerto Rico
- Alianza Leadership Institute
- Alliance for Work, Justice and Education, a former party coalition in Argentina
- Alliance for Chile, a right-wing political coalition in Chile
- Alianza Islámica, Latino Muslim organization