| Rank | Empire | Land Area (Million mi²) | Peak | % Correct |
|---|---|---|---|---|
| 1 | British Empire | 13.71 | 1920 | 97%
|
| 2 | Mongol Empire | 9.27 | 1270 | 95%
|
| 25 | Roman Empire | 1.93 | 117 | 95%
|
| 6 | Second French Colonial Empire | 4.44 | 1920 | 95%
|
| 20 | Second Portuguese Empire | 2.12 | 1820 | 95%
|
| 5 | Spanish Empire | 5.29 | 1810 | 95%
|
| 3 | Russian Empire | 8.8 | 1895 | 92%
|
| 23 | Ottoman Empire | 2.01 | 1683 | 87%
|
| 12 | Empire of Japan | 2.86 | 1942 | 79%
|
| 19 | Achaemenid Empire | 2.12 | 500 BC | 68%
|
| 4 | Qing Dynasty | 5.68 | 1790 | 58%
|
| 11 | Empire of Brazil | 3.22 | 1889 | 55%
|
| 14 | Ming Dynasty | 2.51 | 1450 | 53%
|
| 22 | Macedonian Empire | 2.01 | 323 BC | 50%
|
| 29 | First Mexican Empire | 1.71 | 1821 | 47%
|
| 13 | Eastern Han Dynasty | 2.51 | 100 | 45%
|
| 8 | Umayyad Caliphate | 4.29 | 720 | 45%
|
| 18 | Western Han Dynasty | 2.32 | 50 BC | 45%
|
| 7 | Abbasid Caliphate | 4.29 | 750 | 42%
|
| 24 | Northern Yuan Dynasty | 1.93 | 1368 | 34%
|
| 9 | Yuan Dynasty | 4.25 | 1310 | 34%
|
| 21 | Tang Dynasty | 2.08 | 715 | 32%
|
| 17 | Golden Horde Khanate | 2.32 | 1310 | 26%
|
| 16 | First Turkic Khaganate | 2.32 | 557 | 24%
|
| 27 | Tibetan Empire | 1.78 | 800 | 24%
|
| 26 | Xin Dynasty | 1.81 | 10 | 24%
|
| 15 | Rashidun Caliphate | 2.47 | 655 | 21%
|
| 30 | Timurid Empire | 1.70 | 1405 | 21%
|
| 10 | Xiongnu Empire | 3.47 | 176 BC | 18%
|
| 28 | Xianbei State | 1.74 | 200 | 11%
|