The following is a list of the 28 municipalities ( comuni ) of the Province of Grosseto in the region of Tuscany in Italy.
| Municipality | Population (2025) [1] | Area (km²) [2] | Density |
|---|---|---|---|
| Arcidosso | 4,282 | 93.26 | 45.9 |
| Campagnatico | 2,328 | 162.25 | 14.3 |
| Capalbio | 3,710 | 187.36 | 19.8 |
| Castel del Piano | 4,792 | 67.77 | 70.7 |
| Castell'Azzara | 1,262 | 64.23 | 19.6 |
| Castiglione della Pescaia | 7,026 | 209.28 | 33.6 |
| Cinigiano | 2,424 | 161.55 | 15.0 |
| Civitella Paganico | 2,936 | 192.90 | 15.2 |
| Follonica | 20,174 | 56.02 | 360.1 |
| Gavorrano | 8,322 | 163.98 | 50.8 |
| Grosseto | 81,264 | 473.55 | 171.6 |
| Isola del Giglio | 1,271 | 24.01 | 52.9 |
| Magliano in Toscana | 3,268 | 250.78 | 13.0 |
| Manciano | 6,916 | 372.51 | 18.6 |
| Massa Marittima | 8,186 | 283.45 | 28.9 |
| Monte Argentario | 11,696 | 60.40 | 193.6 |
| Monterotondo Marittimo | 1,273 | 102.59 | 12.4 |
| Montieri | 1,182 | 108.21 | 10.9 |
| Orbetello | 14,020 | 226.80 | 61.8 |
| Pitigliano | 3,533 | 101.97 | 34.6 |
| Roccalbegna | 918 | 124.86 | 7.4 |
| Roccastrada | 8,714 | 284.47 | 30.6 |
| Santa Fiora | 2,490 | 63.45 | 39.2 |
| Scansano | 4,286 | 273.53 | 15.7 |
| Scarlino | 3,709 | 88.29 | 42.0 |
| Seggiano | 997 | 49.43 | 20.2 |
| Semproniano | 1,020 | 81.65 | 12.5 |
| Sorano | 3,006 | 174.56 | 17.2 |