Here is a list of dinosaurs beginning with P.

1. Pachycephalosaurus
2. Pachyrhinosaurus
3. Pachysuchus
4. Padillasaurus
5. Palaeoscincus
6. Paludititan
7. Pampadromaeus
8. Pamparaptor
9. Panamericansaurus
10. Pandoravenator
11. Panguraptor
12. Panoplosaurus
13. Panphagia
14. Papiliovenator
15. Paralitherizinosaurus
16. Paralititan
17. Paranthodon
18. Pararhabdodon
19. Parasaurolophus
20. Paraxenisaurus
21. Pareisactus
22. Parksosaurus
23. Paronychodon
24. Parvicursor
25. Patagonykus
26. Patagopelta
27. Patagosaurus
28. Patagotitan
29. Pawpawsaurus
30. Pectinodon
31. Pedopenna
32. Pegomastax
33. Peishansaurus
34. Pelecanimimus
35. Pellegrinisaurus
36. Peloroplites
37. Pelorosaurus
38. Pendraig
39. Penelopognathus
40. Pentaceratops
41. Perijasaurus
42. Petrobrasaurus
43. Phaedrolosaurus
44. Philovenator
45. Phuwiangosaurus
46. Phuwiangvenator
47. Phyllodon
48. Piatnitzkysaurus
49. Pilmatueia
50. Pinacosaurus
51. Pitekunsaurus
52. Piveteausaurus
53. Planicoxa
54. Plateosauravus
55. Plateosaurus
56. Platypelta
57. Plesiohadros
58. Pneumatoraptor
59. Podokesaurus
60. Poekilopleuron
61. Polacanthus
62. Polyodontosaurus
63. Polyonax
64. Portellsaurus
65. Powellvenator
66. Pradhania
67. Prenocephale
68. Prenoceratops
69. Priconodon
70. Priodontognathus
71. Proa
72. Probactrosaurus
73. Probrachylophosaurus
74. Proceratosaurus
75. Procompsognathus
76. Prodeinodon
77. Propanoplosaurus
78. Prosaurolophus
79. Protarchaeopteryx
80. Protoceratops
81. Protognathosaurus
82. Protohadros
83. Psittacosaurus
84. Pteropelyx
85. Pterospondylus
86. Puertasaurus
87. Pukyongosaurus
88. Pulanesaura
89. Punatitan
90. Pycnonemosaurus
91. Pyroraptor