List of largest empires

1. British Empire

 33.7 million km2  (Year 1923)




2. Mongol Empire

 24.0 million km2 ( Year 1270)




3. Russian Empire

 23.7 million km2 (Year 1866)





4. Ottoman Empire

 20.0 million km2 (Year 1595)






5. Spanish Empire

  20.0 million km2 (Year 1740-1790)






6. Qing Empire, China

 14.7 million km2 (Year 1790)







7. Yuan Dynasty

14.0 million km2 (Year 1310)







8. Umayyad Caliphate

  13.0 million km2 (Year 720)




9. Second French Colonial Empire

 12.3 million km2 (Year 1938)





10. Abbasid Caliphate

 11.1 million km2 (Year 750)




11. Portuguese Empire

  10.4 million km2 (Year 1815)





12. Rashidun Caliphate

  9.0 million km2 (Year 654)




13. Empire of Brazil

 8.5 million km2 (Year 1880)








14. Achaemenid Empire, Persia

  8.0 million km2 (Year 480 BC)





15. Japanese Empire

  7.4 million km2 (Year 1942)







16. Roman Empire

 6.5 million km2 (Year 117)