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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. Odo
40. Ogden, Emily
41. Ogilvie, Sara
42. Ohno, Apolo
43. Ojari, Daniel
44. Olav Lahlum, Hans
45. Oliver, Abi
46. Oliveros, Chris
47. Olivotti, Sergio
48. Olley, Darcie
49. Ollmann, Joe
50. Olney, Peter
51. Olson, Jennifer Gray
52. Olson, Parmy
53. Olusoga, David
54. Olusoga, Kemi
55. Olusoga, Yinka
56. Ondaatje, Michael
57. Oniki, Yuji
58. Onyebuchi, Tochi
59. Orchard, Eric
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