Largest Empire (All empires)

1. British Empire - 36.6 million km² (under George V of the United Kingdom in 1922)

2. Mongol Empire - 33.2 million km² (under Kublai Khan in 1268)

3. Russian Empire - 24.8 million km² (under Alexander II in 1866) - including Alaska

5. Spanish Empire - 18 million km² (under King Charles III r. 1759-1788)

6. Umayyad Arab Caliphate - 13.2 million km²(Hisham ibn Abd al-Malik r. 723-743)

7. Qing Empire - 13 million km²(under Emperor Qianlong)

8. French Empire - 12.5 million km² (under President Albert Lebrun in 1938)

9. Portuguese Empire - 12.4 million km²

10. United States of America - 10 million km² (1898-1934)

11. Rashidun Arab caliphate - 9 million km² (Caliph Uthman Ibn Affan r. 644-656)

12. Empire of Brazil - 8.1 million km²

13. Achaemenid Persian Empire - 7.5 million km²(under Darius the Great)

14. Japanese Empire - 7.4 million km²(during World War II, the Showa Emperor)

15. Ming Empire - 6.5 million km²(under the Jingtai Emperor in 1450)

16. Han Empire - 6 million km²

17. Roman Empire - 5.9 million km² (under Emperor Trojan)

18. Ottoman Empire - 5.5 million km² (under Mehmed IV in 1680)

19. Macedonian Empire - 5.4 million km²(under Alexander the Great)

20. Tang Empire - 5.4 million km² (under the Xuanzong Emperor in 715)

21. Maurya Empire - 5 million km²(under Ashoka the Great)

22. Mughal Empire - 5 million km²(under Aurangzeb in 1690)

23. Byzantine Empire (under Justinian I) - 4.5 million km²

24. Timurid Empire - 4.4 million km²

25. Hunnic Empire - 4 million km²(under Attila the Hun in 441)

26. Mexican Empire - 4 million km²

27. Seljuq Empire - 3.9 million km²

28. Seleucid Empire - 3.9 million km²

29. Italian Empire - 3.8 million km² (during World War II)

30. Dutch Empire - 3.7 million km²

31. Nazi German Empire - 3.6 million km² (during World War II)

32. German Empire - 3.5 million km² (under Wilhelm II before WWI)

33. Gupta Empire - 3.5 million km² (under Chandragupta II in 400)

34. Sassanid Persian Empire - 3.5 million km² (under Khosrau II in 626)

35. Ghaznavid Empire - 3.4 million km²

36. Afsharid Empire - 3.23 million km² (under Nadir Shah)

37. Pala Empire - 3.2 million km² (under Devapala)

38. Delhi Sultanate - 3.2 million km²

39. Khazar Empire - 3 million km²

40. Safavid Empire - 2.85 million km²

41. Parthian Empire - 2.84 million km² (Under Mithridates II 123–88 BCE)

42. Median Empire - 2.8 million km²

43. Chola Empire - 2.6 million km² (under Rajendra Chola I)

44. Denmark-Norway - 2.6 million km²

45. Belgian Empire - 2.5 million km²

46. Qajar Empire - 2.3 million km²

47. Incan Empire - 2 million km² (Under Atahualpa in 1532)

48. Songhai Empire - 1.4 million km² (in 1500)

49. Neo-Assyrian Empire - 1.4 million km²

50. Aksumite Empire - 1.25 million km²

51. Srivijaya Empire - 1.2 million km²

52. Frankish Empire - 1.2 million km²

53. Thai Empire - 1.12 million km² (under Buddha Yodfa Chulaloke in 1782)

54. Mali Empire - 1.1 million km²

55. Swedish Empire - 1.1 million km²

56. Maratha Empire- 1 million km²

57. Harsha Empire - 1 million km²(under Harsha Vardhana in 648)

58. Egyptian Empire - 1 million km²

59. Almoravid Empire - 1 million km²

60. Khmer Empire - 1 million km²

61. Polish-Lithuanian Commonwealth - 990,000 km² (under Sigismund III in 1619)

62. Grand Duchy of Lithuania - 930,000 km² (under Vytautas the Great in 1430)

63. Bulgarian Empire - 700,000 km² (under Tsar Simeon I)

64. Austro-Hungarian Empire - 676,615 km²

65. Akkadian Empire - 650,000 km²

66. Hittite Empire - 610,000 km²

67. Durrani Empire - 600,000 km²

68. Neo-Babylonian Empire - 500,000 km²

69. Armenian Empire - 400,000 km²

70. Vijayanagara Empire - 360,000 km²

71. Korean Empire - 220,186 km²

72. Serbian Empire - 200,000 km²