| Fertilia | |
| Settlement Type: | Frazione of Alghero |
| Subdivision Type: | Country |
| Subdivision Name: | Italy |
| Subdivision Type1: | Region |
| Subdivision Name1: | Sardinia |
| Subdivision Type2: | County |
| Subdivision Name2: | Municipality of Alghero |
| Subdivision Type3: | City |
| Subdivision Name3: | Alghero |
| Established Date: | 1933 |
| Elevation Footnotes: | 10 |
| Population Total: | 1703 |
| Website: | http://www.comune.alghero.ss.it/ |
Fertilia [fer-tì-lia] is a frazione (hamlet) in the municipality of Alghero in the province of Sassari, Sardinia, Italy.
Fertilia was built by the Fascist government of Italy in the 1930s, after the draining of the marshes which covered the area. It was originally populated by immigrants from north east Italy (Veneto and Friuli-Venezia Giulia) and by Istrian and Dalmatian exiles after the second world war. Fertilia lies between Fertilia Airport and the city of Alghero.
left|thumb|250px|View of Fertilia