Public Policy Research Think Tanks: Top Think Tanks - US

1. D.C. - 408
2. California - 172
3. New York - 150
4. Virginia - 107
5. Illinois - 64
6. Maryland - 50
7. Texas - 50
8. Connecticut - 44
9. Pennsylvania - 41
10. New Jersey - 36
11. Florida - 32
12. Colorado - 31
13. Michigan - 31
14. Georgia - 29
15. Ohio - 26
16. Washington - 24
17. Minnesota - 23
18. North Carolina - 23
19. Wisconsin - 22
20. Arizona - 21
21. Indiana - 21
22. Maine - 21
23. Rhode Island - 20
24. Tennessee - 20
25. Missouri - 19
26. Massachusetts - 17
27. Alabama - 17
28. Kansas - 17
29. Oregon - 17
30. New Hampshire - 13
31. Hawaii - 12
32. Kentucky - 12
33. Louisiana - 12
34. Oklahoma - 11
35. Iowa - 10
36. Mississippi - 10 
37. Montana - 9
38. Arkansas - 8
39. Utah - 8
40. Nebraska - 7
41. New Mexico - 7
42. West Virginia - 7
43. South Carolina - 6
44. South Dakota - 5
45. Vermont - 5
46. Idaho - 4
47. Nevada - 4
48. North Dakota - 4
49. Delaware - 3
50. Alaska - 2

Total - 1,872

List found on page 45-46