UFO sightings in Illinois: Air Force files

1. Date unknownChicago first page
2. Date unknownChanute AFB first page
3. Date unknownChicago first page
4. Date unknownChicago first page
5. Date unknownElmhurst first page
6. Date unknownFreeport first page
7. Date unknownLincoln first page
8. Date unknownNauvoo first page
9. Date unknownNetonset first page
10. June 1947Illinois first page
11. August 1947Danforth first page
12. April 19484 Mi. N Of Alton first page
13. April 1948Springfield first page
14. June 1948Scott AFB first page
15. February 1949Chicago first page
16. April 1949Rockford first page
17. February 1950Decatur first page
18. March 1950Bradford first page
19. July 1950Chicago first page
20. September 19505 mi. SW Effingham first page
21. February 1951Calena first page
22. April 1951Chicago first page
23. May 1951Chicago first page
24. August 1951Vandalia first page
25. October 1951Paris first page
26. February 1952Granite City first page
27. April 1952Homewood first page
28. May 1952Lombard first page
29. June 1952Chicago first page
30. July 1952Chicago first page
31. July 1952Chicago first page
32. July 1952Elgin first page
33. July 1952Rock Island first page
34. September 1952Chanute AFB first page
35. October 1952East Moline first page
36. October 1952Momence first page
37. March 1953Mascoutah first page
38. May 1953East St Louis first page
39. August 1953Peoria first page
40. October 1953Scott AFB first page
41. November 1953Indiana first page
42. January 1954Naperville first page
43. March 1954Oak Park first page
44. April 1954Chicago first page
45. May 1954Chicago first page
46. June 1954Danville first page
47. July 1954E. St. Louis first page
48. September 1954New Baden first page
49. October 1954Imperial first page
50. October 1954Scott AFB first page
51. 1955Chicago first page
52. March 195510 Mi N of Huntley first page
53. March 1955Paris first page
54. August 1955Chicago first page
55. September 1955Blue Mound first page
56. September 1955Kankakee first page
57. September 1955Peoria first page
58. September 1955Springfield first page
59. October 1955Morengo first page
60. October 1955Springfield first page
61. November 1955Lemax first page
62. January 195620 miles SW of Chanute AFB first page
63. January 1956Scott, AFB first page
64. March 1956Chicago first page
65. April 1956Gurnie first page
66. May 1956Wheaton first page
67. August 1956Chicago first page
68. August 1956East Danville first page
69. August 1956Harvey first page
70. August 1956Morton Grove first page
71. October 1956Plano first page
72. November 1956Fox River Grove first page
73. April 1957Pesotum first page
74. June 1957Chicago first page
75. July 1957Peoria first page
76. August 1957Farmington first page
77. September 1957Grayville first page
78. November 195715-20 Mi W of Jolliet first page
79. November 1957Joliet first page
80. November 1957Makanda first page
81. November 1957Paris first page
82. November 1957Scott AFB first page
83. November 1957Swansea first page
84. November 1957Waverly first page
85. December 1957O'Fallon first page
86. 1958Collinsville first page
87. January 1958Hillsboro first page
88. January 1958Peoria first page
89. January 1958River Forest first page
90. January 1958Rushville first page
91. January 1958Scott AFB first page
92. May 19582 Mi E Of Mount Prospect first page
93. August 1958Park Ridge first page
94. October 1958Oblong first page
95. November 19582 Mi W Of Darwin first page
96. March 1959Bloomington first page
97. April 1959Niles first page
98. May 1959O'Hara AFB first page
99. June 1959Forest Park first page
100. July 1959Chicago first page
101. July 1959Mooseheart first page
102. August 1959Elburn first page
103. February 196022 Mi NW Of Carbondale first page
104. April 1960Chicago first page
105. May 196023 mi S Of Joliet first page
106. May 1960Decatur first page
107. June 1960Champaign first page
108. July 1960Chanute AFB first page
109. July 1960Chanute AFB first page
110. July 1960Vicinity Monticello first page
111. August 1960Chicago first page
112. August 1960Crete first page
113. August 1960Essex first page
114. August 1960Glenview first page
115. September 1960Champaign first page
116. September 1960Chicago first page
117. September 1960Gurnee first page
118. September 1960Urbana first page
119. November 1960Monticello first page
120. December 1960Arlington Heights first page
121. March 1961Chanute AFB first page
122. April 1961Hanna City AFS first page
123. June 1961Bloomington first page
124. June 1961Champaign first page
125. June 1961Highland Park first page
126. July 1961E of Monticello first page
127. August 1961Gibson City first page
128. September 1961Chicago first page
129. November 1961Arlington Heights. first page
130. November 1961Mackinaw first page
131. November 1961Scott AFB first page
132. December 1961Bartlett first page
133. December 1961Chicago first page
134. December 1961Chicago first page
135. March 1962Chanute AFB first page
136. March 1962Naperville first page
137. April 1962Chicago first page
138. April 1962Danville first page
139. May 1962Chicago first page
140. June 1962Rantoul first page
141. July 196230 N of Kankakee first page
142. July 1962Evanston first page
143. August 1962Chicago first page
144. August 1962Maywood first page
145. September 1962Arlington Heights first page
146. September 1962Chicago first page
147. October 1962Chicago first page
148. October 1962Des Plaines first page
149. January 1963Chicago first page
150. February 1963Gibson City first page
151. March 1963Naperville first page
152. April 1963Joliet first page
153. May 1963Arlington Heights first page
154. May 1963Evanston first page
155. May 1963Northfield first page
156. June 1963Chicago first page
157. June 1963Lincolnwood first page
158. June 1963Skokie first page
159. July 1963Glen Ellyn first page
160. August 1963Chicago first page
161. August 1963Niles first page
162. September 1963Bloomington first page
163. September 1963La Grange first page
164. October 1963Fairfield first page
165. November 1963St Peter first page
166. December 1963Dixon first page
167. January 1964Bournnais first page
168. April 1964Oak Lawn first page
169. May 1964Chicago first page
170. May 1964Des Plaines first page
171. May 1964Elmhurst first page
172. June 1964Chicago first page
173. July 1964Buckley first page
174. July 1964Chicago first page
175. September 1964Momence first page
176. January 1965Morton first page
177. February 1965Elk Grove, Village first page
178. April 1965Durand first page
179. July 1965Chicago first page
180. July 1965Des Plaines first page
181. July 1965Elmhurst first page
182. July 1965Illinois first page
183. August 1965Calumet City first page
184. August 1965Calumet Park first page
185. August 1965Chicago first page
186. August 1965Chicago first page
187. August 1965Chicago first page
188. August 1965Chicago first page
189. August 1965Ottawa first page
190. August 1965Prospect Heights first page
191. August 1965Tinley Park first page
192. August 1965Wooddale first page
193. September 1965Chicago first page
194. September 1965Chicago first page
195. October 1965Chicago first page
196. October 1965Chicago first page
197. October 1965Rolling Meadows first page
198. November 1965Chicago first page
199. November 1965Des Plaines Chicago first page
200. November 1965Des Plaines chicago first page
201. November 1965Oak Park first page
202. November 1965Rivergrove first page
203. December 1965Evanston first page
204. February 1966Farmington first page
205. March 1966Chicago first page
206. March 1966Normal first page
207. April 1966Chicago first page
208. April 1966Riverton first page
209. May 1966Chicago first page
210. May 1966Chicago first page
211. June 1966Chicago first page
212. June 1966Chicago first page
213. June 1966Northlake first page
214. July 1966Belleville first page
215. July 1966Dixon first page
216. July 1966Johnston City first page
217. July 1966Ladd first page
218. August 1966Arlington Heights first page
219. August 1966Oaklawn. first page
220. August 1966Wilmette first page
221. September 1966Chicago first page
222. September 1966Metropolis first page
223. October 1966Casey first page
224. October 1966Chicago first page
225. October 1966Peoria first page
226. February 1967Bellwood first page
227. February 1967Hazelcrest first page
228. February 1967Urbana first page
229. March 1967Calena first page
230. March 1967Galesburg, Moline first page
231. March 1967Kilborne first page
232. March 1967Lake Canton, Canton first page
233. March 1967Mount Prospect first page
234. April 1967Westmont first page
235. May 1967Downers, Grove first page
236. June 1967Chicago first page
237. June 1967Nauvoo first page
238. July 1967Westmont first page
239. October 1967Joliet first page
240. December 1967Mahomet first page
241. February 1968Evansville first page
242. April 1968Chicago Ridge first page
243. June 1968Walbash first page
244. October 1968Burnham first page
245. October 1968Decatur first page
246. November 1968Collinsville first page
247. November 1968Near Waterloo first page
248. March 1969Benton first page
249. October 1969Chicago first page
250. December 1969Round Lake first page

Links open the original folder at the US National Archives.