| Area in sq. km. | |||||
| Sl. No. | District Name | Change (T1) | Change (T2) | Change (T3) | Overall Change |
| 1990 to 2000 | 2000 to 2010 | 2010 to 2021 | 1990 to 2021 | ||
| 1 | RI BHOI | 148 | −63 | 63 | 148 |
| 2 | WEST GARO HILLS | −273 | 3 | 159 | −111 |
| 3 | EAST GARO HILLS | −75 | −62 | 54 | −83 |
| 4 | WEST KHASI HILLS | −52 | −34 | −28 | −114 |
| 5 | JAINTIA HILLS | 461 | −244 | −199 | 18 |
| 6 | EAST KHASI HILLS | 89 | −149 | 103 | 43 |
| 7 | SOUTH GARO HILLS | −120 | 113 | 8 | 1 |
| TOTAL | 178 | −436 | 160 | −98 | |