There are 6 municipalities within the province of Trieste in Friuli-Venezia Giulia. Duino aurisina is the largest city by population with a total of 8.266 inhabitants.
| Name | Population | Density | Altitude |
|---|---|---|---|
| Duino aurisina | 8.266 | 182pp/km² | 144m |
| Monrupino | 853 | 68pp/km² | 418m |
| Muggia | 12.872 | 929pp/km² | 3m |
| San dorligo della valle | 5.684 | 235pp/km² | 106m |
| Sgonico | 1.998 | 64pp/km² | 278m |
| Trieste | 199.032 | 2.339pp/km² | 2m |
