Total surface area (Square kilometre)
| 2012 | 2015 | 2018 |
| Île de France | 12 069,0 | 12 069,0 | 12 070,0 |
| Champagne-Ardenne | 25 719,0 | 25 719,0 | |
| Picardie | 19 505,0 | 19 505,0 | |
| Haute-Normandie | 12 354,0 | 12 354,0 | |
| Centre (FR) | 39 530,0 | 39 530,0 | |
| Basse-Normandie | 17 759,0 | 17 759,0 | |
| Bourgogne | 31 753,0 | 31 753,0 | |
| Nord - Pas-de-Calais | 12 445,0 | 12 445,0 | |
| Lorraine | 23 669,0 | 23 669,0 | |
| Alsace | 8 329,0 | 8 329,0 | |
| Franche-Comté | 16 307,0 | 16 307,0 | |
| Pays de la Loire | 32 376,0 | 32 376,0 | |
| Bretagne | 27 471,0 | 27 471,0 | |
| Poitou-Charentes | 25 967,0 | 25 967,0 | |
| Aquitaine | 41 804,0 | 41 804,0 | |
| Midi-Pyrénées | 45 603,0 | 45 603,0 | |
| Limousin | 17 056,0 | 17 056,0 | |
| Rhône-Alpes | 44 963,0 | 44 963,0 | |
| Auvergne | 26 173,0 | 26 173,0 | |
| Languedoc-Roussillon | 27 643,0 | 27 643,0 | |
| Provence-Alpes-Côte d'Azur | 31 838,0 | 31 838,0 | |
| Corse | 8 726,0 | 8 726,0 | |