Have you ever wondered how many protected areas there are in Thailand? I did. So with the help of WikiPedia I decided to list them all out and number them. And what a revelation it is. It just goes to show how committed Thailand is/was in setting up its National Parks and protected areas which have been established in existing wilderness areas since 1962. It also shows the massive task that Thailand's Department of Nartional Parks must manage and care for. 

Its a national heritage of immense proportions, held in perpetuity for generations of Thai's to come.

National Parks in western, central, and eastern Thailand

1. Chaloem Phrakiat Thai Prachan National Park (a new park in Ratchaburi - few facilities)
2. Chaloem Rattanakosin National Park
3. Erawan National Park
4. Kaeng Krachan National Park (Thailand's largest National Park)
5. Khao Chamao–Khao Wong National Park
6. Khao Khitchakut National Park
7. Khao Laem National Park
8. Khao Sip Ha Chan National Park
9. Khuean Srinagarindra National Park (famous for Mae Khamin waterfall)
10. Khun Phra Wo National Park
11. Kui Buri National Park (best chance of seeing elephant and gaur)
12. Lam Khlong Ngu National Park (famous for caves)
13. Namtok Huai Yang National Park
14. Namtok Khlong Kaeo National Park
15. Namtok Pacharoen National Park
16. Namtok Phlio National Park
 
National parks in North eastern (Issan) Thailand and adjacent areas

17. Huai Huat National Park
18. Kaeng Tana National Park
19. Khao Phra Wihan National Park
20. Khao Yai National Park (Thailand's first National Park)
21. Mukdahan National Park
22. Na Haew National Park
23. Nam Phong National Park
24. Pang Sida National Park
25. Pa Hin Ngam National Park
26. Pha Taem National Park
27. Phu Chong–Na Yoi National Park
28. Phu Kao–Phu Phan Kham National Park
29. Phu Kradueng National Park
30. Phu Laenkha National Park
31. Phu Pha Lek National Park
32. Phu Pha Man National Park
33. Phu Pha Yon National Park
34. Phu Phan National Park
35. Phu Ruea National Park
36. Phu Sa Dok Bua National Park
37. Phu Suan Sai National Park
38. Phu Wiang National Park
39. Sai Thong National Park
40. Ta Phraya National Park
41. Tat Mok National Park
42. Tat Ton National Park
43. Thap Lan National Park (Thailand's second largest National Park)
 
National Parks in Northern Thailand
 
44. Chae Son National Park
45. Doi Chong National Park
46. Doi Inthanon National Park
47. Doi Khun Tan National Park
48. Doi Luang National Park
49. Doi Pha Hom Pok National Park
50. Doi Pha Klong National Park
51. Doi Phu Kha National Park
52. Doi Phu Nang National Park
53. Doi Suthep-Pui National Park
54. Doi Wiang Pha National Park
55. Huai Nam Dang National Park
56. Kaeng Chet Khwae National Park
57. Khao Kho National Park
58. Khlong Lan National Park
59. Khlong Wang Chao National Park
60. Klong Tron National Park
61. Khun Chae National Park
62. Khun Khan National Park
63. Khun Nan National Park
64. Khun Sathan National Park
65. Lam Nam Nan National Park
66. Lam Nam Kok National Park
67. Lan Sang National Park
68. Mae Charim National Park
69. Mae Moei National Park
70. Mae Ngao National Park
71. Mae Phang National Park
72. Mae Puem National Park
73. Mae Ping National Park
74. Mae Ta Krai National Park
75. Mae Tho National Park
76. Mae Wa National Park
77. Mae Wang National Park
78. Mae Wong National Park
79. Mae Yom National Park
80. Na Haeo National Park
81. Nam Nao National Park
82. Namtok Chat Trakan National Park
83. Namtok Mae Surin National Park
84. Nanthaburi National Park
85. Op Khan National Park
86. Op Luang National Park
87. Pha Daeng National Park
88. Phu Hin Rong Kla National Park
89. Phu Langka National Park
90. Phu Sang National Park
91. Phu Soi Dao National Park
92. Salawin National Park
93. Si Lanna National Park
94. Si Nan National Park
95. Si Satchanalai National Park
96. Taksin Maharat National Park
97. Tham Pha Thai National Park
98. Tham Pla–Namtok Pha Suea National Park
99. Tham Sakoen National Park
100. Thung Salaeng Luang National Park
101. Wiang Kosai National Park
102. National parks in southern Thailand
103. Bang Lang National Park
104. Budo-Sungai Padi National Park
105. Kaeng Krung National Park
106. Khao Lak-Lam Ru National Park
107. Khao Luang National Park
108. Khao Nam Khang National Park
109. Khao Nan National Park
110. Khao Phanom Bencha National Park
111. Khao Pu–Khao Ya National Park
112. Khao Sok National Park
113. Khlong Phanom National Park
114. Namtok Ngao National Park
115. Namtok Sai Khao National Park
 
Wildlife sanctuaries in Thailand

116. Buntharik - Khao Yot Mon Wildlife Sanctuary
117. Chiang Dao Wildlife Sanctuary
118. Doi Pha Chang Wildlife Sanctuary
119. Doi Pha Muang Wildlife Sanctuary
120. Dong Yai Wildlife Sanctuary
121. Hala Bala Wildlife Sanctuary
122. Hua Tabtan Hadsamran Wildlife Sanctuary
123. Huai Kha Khaeng Wildlife Sanctuary
124. Huai Sala Wildlife Sanctuary
125. Khao Ang Rue Nai Wildlife Sanctuary
126. Khao Khiao - Khao Chomphu Wildlife Sanctuary
127. Khao Phra Thaeo Wildlife Sanctuary
128. Khao Sanam Priang Wildlife Sanctuary
129. Khao Soi Dao Wildlife Sanctuary
130. Khlong Nakha Wildlife Sanctuary
131. Khlong Phraya Wildlife Sanctuary
132. Khlong Saeng Wildlife Sanctuary
133. Khlong Yan Wildlife Sanctuary
134. Lam Nam Nan Phang Kha Wildlife Sanctuary
135. Lum Nam Pai Wildlife Sanctuary
136. Mae Lao-Mae Sae Wildlife Sanctuary
137. Mae Nam Phachi Wildlife Sanctuary
138. Mae Tuen Wildlife Sanctuary
139. Mae Yom Phang Khwa Wildlife Sanctuary
140. Nam Pat Wildlife Sanctuary
141. Om Koi Wildlife Sanctuary
142. Phanom Dong Rak Wildlife Sanctuary
143. Phu Khiao Wildlife Sanctuary
144. Phu Luang Wildlife Sanctuary
145. Phu Miang-Phu Thong Wildlife Sanctuary[14]
146. Phu Wua Wildlife Sanctuary
147. Salak Pra Wildlife Sanctuary
148. Salawin Wildlife Sanctuary
149. Sap Langka Wildlife Sanctuary
150. Thungyai Naresuan Wildlife Sanctuary
151. Ton Nga-Chang Wildlife Sanctuary
152. Ton Pariwat Wildlife Sanctuary
153. Umphang Wildlife Sanctuary
154. Yot Dom Wildlife Sanctuary
 
Marine National Parks in Thailand

155. Ao Phang Nga
156. Hat Wanakon
157. Hat Chao Mai
158. Hat Nai Yang
159. Hat Nopharat Thara-Mu Ko Phi Phi
160. Khao Laem Ya-Mu Ko Samet
161. Khao Lampi–Hat Thai Mueang
 
Forest parks in Thailand (do not have national park status but are protected)

162. Bantak Petrified Forest Park
163. Khao Kradong Forest Park
164. Khao Laem Sing Forest Park
165. Khao Phang Forest Park
166. Kosamphi Forest Park
167. Namron Huai Mak Liam Forest Park
168. Namtok Huai Lao Forest Park
169. Namtok Hua Mae Kham Forest Park
170. Namtok Huai Mae Sak Forest Park
170. Namtok Khun Kon Forest Park
171. Namtok Mae Tho Forest Park
171. Namtok Pong Phra Bat Forest Park
172. Namtok Raman Forest Park
173. Namtok Sai Khao Forest Park
174. Namtok Si Chomphu Forest Park
175. Namtok Than Ngam Forest Park
176. Namtok Than Thip Forest Park
177. Namtok Thara Sawan Forest Park
178. Namtok Tat Khwan Forest Park
179. Phae Mueang Phi Forest Park
180. Phaya Pipak Forest Park
181. Phnom Sawai Forest Park
182. Phu Chi Fa Forest Park
183. Phu Faek Forest Park
184. Phu Langka Forest Park
185. Phu Mu Forest Park
186. Phu Muang Forest Park
187. Phu Pha Lom Forest Park
188. Phu Phra Bat Buabok Forest Park
189. Pran Buri Forest Park
190. Pratan Dongrung Forest Park
191. Sa Nang Manora Forest Park
192. San Pha Phaya Phrai Forest Park
193. Tham Luang - Khun Nam Nang Non Forest Park
194. Tung Bua Tong Forest Park
 
Other protected areas

195. Ao Khung Kraben Non-hunting Area
196. Ban Chiang archaeological site
197. Bueng Boraphet Non-hunting Area
198. Bueng Khong Long Non-hunting Area
199. Don Hoi Lot
200. Khao Somphot Non-hunting Area
201. Khao Tha Phet Non-hunting Area
201. Khu Khut Water Fowl Park
203. Krabi River Estuary
204. Kraburi River Estuary
205. Mae Salit - Pong Daeng Forestry Reserve
206. Nong Han Kumphawapi Lake
207. Nong Thung Thong Non-hunting Area
208. Pha Nam Thip Non-hunting Area
209. Phanom Rung historical park
210. Thale Noi Non-hunting Area
211. Tham Pha Tha Phon Non-hunting Area

For additional information we recommend you view this site:

https://www.protectedplanet.net/search?q=thailand