Ghilarza
- Sardinian name: Ilàrtzi
- Population: 4.064
- Elevation: 290 m a.s.l.
- Demonym: Ghilarzesi/Ilartzesos
- Neighbouring municipalities: Aidomaggiore, Ardauli, Bidonì, Boroneddu, Busachi, Fordongianus, Norbello, Paulilatino, Sedilo, Soddì, Sorradile, Tadasuni, Ula Tirso
