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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. Ord, Charlotte
61. Ordóñez, Miguel
62. Orlando, Jade
63. Orloff, Judith
64. Orr, Kristen
65. Orr, Wendy
66. Ortega, Claribel A.
67. Orwell, George
68. Orwell, George
69. Oshiro, Mark
70. Osho
71. Osho
72. Osmond, Richard
73. Ostaseski, Frank
74. Ostertag, Molly Knox
75. Ostow, Micol
76. Otoshi, Kathryn
77. Ottaviani, Jim
78. Oubrerie, Clément
79. Oubrerie, Marguerite Abouet & Clément
80. Ounsley, Jodie
81. Overdeck, Laura
82. Owen, Amanda
83. Owen, Margaret
84. Owen, Sid
85. Owens, Lisa
86. Oxlade, Chris
87. Oyemakinde, Tomi
88. Oyeyemi, Helen
89. Oyin
90. Ozaki, Yei Theodora