Here are the largest dynasties by land area. Note that all dynasties are listed here, not just Chinese. This list is by land area measured in millions of square kilometers:

1. Yuan dynasty 14.0
2. Qing dynasty 13.1
3. Ming dynasty 6.5
4. Han dynasty 6.5
5. Tang dynasty 5.5
6. Northern Yuan dynasty 5.0
7. Xin dynasty 4.7
8. Afsharid dynasty 4.5
9. Qajar dynasty 3.0
10. Northern Song Dynasty 3.5
11. Safavid dynasty 3.5
12. Western Jin dynasty 3.5
13. Tughlaq dynasty 3.2
14. Karkota Dynasty of Kashmir 3.09
15. Sui Dynasty 3.1
16. Samanid dynasty 2.85
17. Eastern Jin dynasty 2.8
18. Liu Song dynasty 2.8
19. Maratha Empire 2.8
20. Qin dynasty 2.8
21. Khilji dynasty 2.7
22. Liao dynasty 2.6
23. Jurchen Jin dynasty 2.3
24. Later Zhao dynasty 2.5
25. Southern Qi dynasty 2.3
26. Southern Song dynasty 2.1
27. Wei dynasty 2.0
28. Earlier Zhao dynasty 2.0
29. Former Qin dynasty 2.0
30. Northern Wei dynasty 2.0
31. Saffarid dynasty, Iran 2.0
32. Rashtrakuta dynasty 1.7
33. Wu Dynasty 1.5
34. Northern Zhou Dynasty 1.5
35. Nanda Dynasty 1.5
36. Idrisid dynasty, Morocco 1.5
37. Zand dynasty 1.4
38. Liang Dynasty 1.3
39. Western Wei Dynasty 1.3
40. Later Liang 1.3
41. Later Tang 1.3
42. Taungoo Dynasty 1.3
43. Shang Dynasty 1.25

(To see a larger and more comprehensive list, including more smaller dynasties, and a lot of non-"dynasty" empires, please refer to wikipedia.org/wiki/List_of_largest_empires.)