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- Cattedrale di Santa Maria Catholic (Latin rite) · Cathedral
- Chiesa di Nostra Signora del Carmelo Catholic (Latin rite) · Church
- Chiesa di Nostra Signora della Misericordia Catholic (Latin rite) · Church
- Chiesa di San Francesco Catholic (Latin rite) · Church
- Chiesa di San Michele Catholic (Latin rite) · Church
- Chiesa di Sant'Agostino Vecchio Catholic (Latin rite) · Church
- Chiesa di Sant'Anna intra mœnia House of prayer
- Diocesan Museum of Alghero Church
- Nostra Signora della Mercede Catholic (Latin rite) · Church
- San Giovanni Bosco Catholic (Latin rite) · Church
- San Luca Evangelista Catholic (Latin rite) · Church
- San Marco Catholic (Latin rite) · Church
- Sant'Agostino Catholic (Latin rite) · Church
- Santissimo Rosario Catholic (Latin rite) · Church
- Chiesa Cristiana Evangelica dei Fratelli Evangelical and independent · House of prayer · Via Angelo Roth 6
- Chiesa di Santa Teresa House of prayer
- Gesù Crocifisso Catholic (Latin rite) · Church
- Mater Purissima Catholic (Latin rite) · Church
- Nostra Signora della Guardia Catholic (Latin rite) · Church
- Nostra Signora della Speranza Catholic (Latin rite) · Church
- Nostra Signora Stella Maris Catholic (Latin rite) · Church
- San Giovanni Battista Catholic (Latin rite) · Church
- San Giovanni Nemopuceno Catholic (Latin rite) · Chapel
- San Giuseppe Catholic (Latin rite) · Church
- San Paolo Catholic (Latin rite) · Church
- Santa Caterina Catholic (Latin rite) · Chapel
- Santa Maria Ausiliatrice Catholic (Latin rite) · Church
- Santa Maria Goretti Catholic (Latin rite) · Church
- Sant'Anna Catholic (Latin rite) · Church
- Sant'Antonio Abate Catholic (Latin rite) · Church
- Sant'Efisio Martire Catholic (Latin rite) · Church
- Santissimi Angeli Custodi Catholic (Latin rite) · Church
- Santissimo Nome di Gesù Catholic (Latin rite) · Church