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The following are the top 100 racehorses of the 20th century as compiled by Blood-Horse magazine.
| Rank | Horse |
|---|---|
| 1. | Man o'War |
| 2. | Secretariat |
| 3. | Citation |
| 4. | Kelso |
| 5. | Count Fleet |
| 6. | Dr. Fager |
| 7. | Native Dancer |
| 8. | Forego |
| 9. | Seattle Slew |
| 10. | Spectacular Bid |
| 11. | Tom Fool |
| 12. | Affirmed |
| 13. | War Admiral |
| 14. | Buckpasser |
| 15. | Colin |
| 16. | Damascus |
| 17. | Round Table |
| 18. | Cigar |
| 19. | Bold Ruler |
| 20. | Swaps |
| 21. | Equipoise |
| 22. | Phar Lap |
| 23. | John Henry |
| 24. | Nashua |
| 25. | Seabiscuit |
| 26. | Whirlaway |
| 27. | Alydar |
| 28. | Gallant Fox |
| 29. | Exterminator |
| 30. | Sysonby |
| 31. | Sunday Silence |
| 32. | Skip Away |
| 33. | Assault |
| 34. | Easy Goer |
| 35. | Ruffian |
| 36. | Gallant Man |
| 37. | Discovery |
| 38. | Challedon |
| 39. | Armed |
| 40. | Busher |
| 41. | Stymie |
| 42. | Alysheba |
| 43. | Northern Dancer |
| 44. | Ack Ack |
| 45. | Gallorette |
| 46. | Majestic Prince |
| 47. | Coaltown |
| 48. | Personal Ensign |
| 49. | Sir Barton |
| 50. | Dahila |
| 51. | Susan's Girl |
| 52. | Twenty Grand |
| 53. | Sword Dancer |
| 54. | Grey Lag |
| 55. | Devil Diver |
| 56. | Zev |
| 57. | Riva Ridge |
| 58. | Slew o'Gold |
| 59. | Twilight Tear |
| 60. | Native Diver |
| 61. | Omaha |
| 62. | Cicada |
| 63. | Silver Charm |
| 64. | Holy Bull |
| 65. | Alsab |
| 66. | Top Flight |
| 67. | Arts and Letters |
| 68. | All Along |
| 69. | Noor |
| 70. | Shuvee |
| 71. | Regret |
| 72. | Go for Wand |
| 73. | Johnstown |
| 74. | Bald Eagle |
| 75. | Hill Prince |
| 76. | Lady's Secret |
| 77. | Two Lea |
| 78. | Eight Thirty |
| 79. | Gallant Bloom |
| 80. | Ta Wee |
| 81. | Affectionately |
| 82. | Miesque |
| 83. | Carry Back |
| 84. | Bimelech |
| 85. | Lure |
| 86. | Fort Marcy |
| 87. | Gamely |
| 88. | Old Rosebud |
| 89. | Bewitch |
| 90. | Davona Dale |
| 91. | Genuine Risk |
| 92. | Sarazen |
| 93. | Sun Beau |
| 94. | Artful |
| 95. | Bayakoa |
| 96. | Exceller |
| 97. | Foolish Pleasure |
| 98. | Beldame |
| 99. | Roamer |
| 100. | Blue Larkspur |
