"Desert" = <250 mm annual precipitation. The eight largest by area span five continents.
| Rank | Desert | Area (km²) | Primary Location | Type |
|---|---|---|---|---|
| 1 | Antarctic Desert | 14,200,000 | Antarctica | Polar |
| 2 | Arctic Desert | 13,900,000 | Arctic (N. America, Europe, Asia) | Polar |
| 3 | Sahara | 9,200,000 | North Africa | Subtropical hot |
| 4 | Arabian | 2,330,000 | Arabian Peninsula | Subtropical hot |
| 5 | Gobi | 1,295,000 | Mongolia / China | Cold winter |
| 6 | Patagonian | 673,000 | Argentina / Chile | Cold winter |
| 7 | Great Victoria | 647,000 | Australia | Subtropical hot |
| 8 | Kalahari | 560,000 | Southern Africa | Subtropical hot |
Sahara alone > next 4 combined. Antarctic = 1.5 × Sahara. Desert classification follows Köppen BW (arid) / EF (polar ice).