The following is a list of the 28 municipalities (comuni) of the Province of Grosseto, Tuscany, Italy.
| ISTAT Code | Comune | Population, 31.12.2010 |
|---|---|---|
| 53001 | 4,427 | |
| 53002 | 2,532 | |
| 53003 | 4,287 | |
| 53004 | 4,700 | |
| 53005 | 1,625 | |
| 53006 | 7,449 | |
| 53007 | 2,778 | |
| 53008 | 3,249 | |
| 53009 | 22,113 | |
| 53010 | 8,982 | |
| 53011 | 81,928 | |
| 53012 | 1,466 | |
| 53013 | 3,746 | |
| 53014 | 7,633 | |
| 53015 | 8,781 | |
| 53016 | 12,997 | |
| 53017 | 1,250 | |
| 53018 | 15,246 | |
| 53019 | 3,927 | |
| 53020 | 1,136 | |
| 53021 | 9,540 | |
| 53022 | 2,773 | |
| 53023 | 4,636 | |
| 53024 | 3,718 | |
| 53025 | 998 | |
| 53026 | 3,656 | |
| 53027 | 1,392 | |
| 53028 | 1,192 | |