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1. O. Stephens, William
2. O'Brien, Jack
3. O'Brien, Sean
4. O'Byrne, Nicola
5. O'Byrne, Nicola
6. O'Callaghan, Jonathan
7. O'Connell, Joanne
8. O'Connor, Barbara
9. O'Connor, Bridget
10. O'Connor, Elizabeth
11. O'Connor, George
12. O'Connor, Kevin E.
13. O’Connor, Katherine Tiernan
14. O'Dell, Emily Jane
15. O'Dowd, Chris
16. O'Hara, Lauren
17. O'Hara, Mo
18. O'Hara, Mo
19. O'Hara, Natalia
20. O'Hare, Gráinne
21. O'Kane, Owen
22. O'Meara, Tim
23. O'Neil, Scott
24. O'Neill, Amanda
25. O'Neill, Heather Aimee
26. O'Neill, Lisa
27. O'Neill, Lisa
28. O'Neill, Martin
29. O’Neill, Eamonn
30. O'Reilly, Bill
31. O'Reilly, Bill
32. O'Sullivan, Ronnie
33. O'Yeah, Zac
34. O'Yeah , Zac
35. Oakley, Stu
36. Obomsawin, Diane
37. Oborne, Martine
38. Obuhanych, Karen
39. Ogden, Emily
40. Ogilvie, Sara
41. Ohno, Apolo
42. Ojari, Daniel
43. Olav Lahlum, Hans
44. Oliver, Abi
45. Oliveros, Chris
46. Olivotti, Sergio
47. Olley, Darcie
48. Ollmann, Joe
49. Olney, Peter
50. Olson, Jennifer Gray
51. Olson, Parmy
52. Olusoga, David
53. Olusoga, Kemi
54. Olusoga, Yinka
55. Ondaatje, Michael
56. Oniki, Yuji
57. Onyebuchi, Tochi
58. Orchard, Eric
59. Orczy, Baroness
60. Orczy, Baroness
61. Ord, Charlotte
62. Ordóñez, Miguel
63. Orlando, Jade
64. Orloff, Judith
65. Orr, Kristen
66. Orr, Wendy
67. Ortega, Claribel A.
68. Orwell, George
69. Orwell, George
70. Oshiro, Mark
71. Osho
72. Osho
73. Osmond, Richard
74. Ostaseski, Frank
75. Ostertag, Molly Knox
76. Ostow, Micol
77. Otoshi, Kathryn
78. Ottaviani, Jim
79. Oubrerie, Clément
80. Oubrerie, Marguerite Abouet & Clément
81. Ounsley, Jodie
82. Overdeck, Laura
83. Owen, Amanda
84. Owen, Margaret
85. Owen, Sid
86. Owens, Lisa
87. Oxlade, Chris
88. Oyemakinde, Tomi
89. Oyeyemi, Helen
90. Oyin
91. Ozaki, Yei Theodora