| Sq mi (millions) | Year at peak | % of world population | Empire | % Correct |
|---|---|---|---|---|
| 13.71 | 1920 | 26.35 | British Empire | 98%
|
| 9.27 | 1270/1309 | 17.81 | Mongol Empire | 97%
|
| 4.44 | 1920 | 8.53 | Second French Empire | 93%
|
| 8.80 | 1895 | 16.92 | Russian Empire | 91%
|
| 5.29 | 1810 | 10.17 | Spanish Empire | 91%
|
| 1.93 | 117 | 3.71 | Roman Empire | 89%
|
| 2.01 | 1683 | 3.86 | Ottoman Empire | 86%
|
| 2.86-3.28 | 1942 | 5.49-6.32 | Empire of Japan | 85%
|
| 1.21 | 1911 | 2.34 | German Empire | 82%
|
| 2.12 | 500 BC | 4.08 | Achaemenid Empire | 80%
|
| 2.12 | 1820 | 4.08 | Second Portuguese Empire | 80%
|
| 1.31 | 1670 | 2.52 | First French Empire | 73%
|
| 1.48 | 1941 | 2.84 | Italian Empire | 68%
|
| 5.68 | 1790 | 10.91 | Qing Dynasty | 68%
|
| 2.51 | 100 | 4.82 | Eastern Han Dynasty | 59%
|
| 2.32 | 50 BC | 4.45 | Western Han Dynasty | 59%
|
| 1.71 | 1821 | 3.29 | First Mexican Empire | 57%
|
| 2.01 | 323 BC | 3.86 | Macedonian Empire | 56%
|
| 2.51 | 1450 | 4.82 | Ming Dynasty | 56%
|
| 1.54 | 1690 | 2.97 | Mughal Empire | 56%
|
| 3.22 | 1889 | 6.19 | Empire of Brazil | 53%
|
| 4.29 | 720 | 8.24 | Umayyad Caliphate | 53%
|
| 1.20 | 980 | 2.30 | Northern Song Dynasty | 46%
|
| 4.29 | 750 | 8.24 | Abbasid Caliphate | 43%
|
| 1.93 | 1368 | 3.71 | Northern Yuan Dinasty | 41%
|
| 4.25 | 1310 | 8.16 | Yuan Dinasty | 41%
|
| 2.08 | 715 | 4.01 | Tang Dynasty | 39%
|
| 2.32 | 1310 | 4.45 | Golden Horde Khanate | 29%
|
| 1.31-1.93 | 261 BC/250 BC | 2.52-3.71 | Maurya Empire | 29%
|
| 1.70 | 1405 | 3.27 | Timurid Empire | 28%
|
| 1.54 | 441 | 2.97 | Hunnic Empire | 26%
|
| 2.47 | 655 | 4.75 | Rashidun Caliphate | 25%
|
| 1.78 | 800 | 3.41 | Tibetan Empire | 23%
|
| 1.58 | 969 | 3.04 | Fatimid Caliphate | 18%
|
| 1.45 | 1310 | 2.78 | Ilkhanate | 17%
|
| 1.24 | 1312 | 2.37 | Delhi Sultanate | 16%
|
| 1.51 | 301 BC | 2.89 | Seleucid Empire | 16%
|
| 1.35 | 1310/1350 | 2.60 | Chagatai Khanate | 14%
|
| 1.54 | 624 | 2.97 | Eastern Turkic Khaganate | 13%
|
| 1.35 | 630 | 2.60 | Western Turkic Khaganate | 13%
|
| 1.35 | 20 | 2.60 | Western Xiongnu | 11%
|
| 3.47 | 176 BC | 6.68 | Xiongnu Empire | 11%
|
| 1.81 | 10 | 3.49 | Xin Dinasty | 10%
|
| 1.35 | 550 | 2.60 | Sasanian Empire | 8%
|
| 1.31 | 1029 | 2.52 | Ghaznavid Empire | 7%
|
| 1.39 | 1650 | 2.67 | Dzungar Khanate | 6%
|
| 1.51 | 1080 | 2.89 | Great Seljuq Empire | 6%
|
| 2.74 | 1640 | 5.27 | Iberian Union | 6%
|
| 2.32 | 557 | 4.45 | First Turkic Khaganate | 3%
|
| 1.74 | 200 | 3.34 | Xianbei State | 1%
|