Below are the most popular birthdays in the United States sorted from most popular to least popular. September clearly leads as a popular birthday month.

 

Rank Month Day
1 September 16
2 September 9
3 September 23
4 September 17
5 September 22
6 September 24
7 September 21
8 September 15
9 September 10
10 September 18
11 September 25
12 July 8
13 September 19
14 July 7
15 September 20
16 September 14
17 August 12
18 July 22
19 September 30
20 October 1
21 September 27
22 September 29
23 September 28
24 September 11
25 July 15
26 December 30
27 September 26
28 July 29
29 September 8
30 August 19
31 August 20
32 July 23
33 August 18
34 August 27
35 July 28
36 August 5
37 July 9
38 August 26
39 July 30
40 July 16
41 September 12
42 December 29
43 July 14
44 August 28
45 July 21
46 August 6
47 July 2
48 August 4
49 July 10
50 July 1
51 July 20
52 August 10
53 October 2
54 August 17
55 August 14
56 August 11
57 August 21
58 July 27
59 August 25
60 August 7
61 July 17
62 December 28
63 August 24
64 August 8
65 August 31
66 August 3
67 August 13
68 July 31
69 September 13
70 August 16
71 August 15
72 July 24
73 August 30
74 August 29
75 June 30
76 July 6
77 August 9
78 July 25
79 October 5
80 July 26
81 August 23
82 August 22
83 October 6
84 October 7
85 August 2
86 August 1
87 July 19
88 October 3
89 October 4
90 July 11
91 July 18
92 September 3
93 July 12
94 December 17
95 June 24
96 December 18
97 October 8
98 September 4
99 July 13
100 June 25
101 June 29
102 December 16
103 February 14
104 December 20
105 September 7
106 September 1
107 June 17
108 June 28
109 October 15
110 June 23
111 September 6
112 June 26
113 December 19
114 September 2
115 December 21
116 October 14
117 June 16
118 June 22
119 October 9
120 June 10
121 June 2
122 October 10
123 May 20
124 June 3
125 September 5
126 June 18
127 July 3
128 December 15
129 June 27
130 December 27
131 November 4
132 June 20
133 March 3
134 March 17
135 October 21
136 October 12
137 June 11
138 May 21
139 June 15
140 June 19
141 May 22
142 October 28
143 November 5
144 December 2
145 June 21
146 June 4
147 November 19
148 November 18
149 December 1
150 March 4
151 November 20
152 March 18
153 June 1
154 June 9
155 October 16
156 March 5
157 February 24
158 November 11
159 October 20
160 October 11
161 November 17
162 March 25
163 March 11
164 October 22
165 March 12
166 February 12
167 May 24
168 May 19
169 June 14
170 June 12
171 February 10
172 October 27
173 October 29
174 May 14
175 May 12
176 May 23
177 May 5
178 November 3
179 June 5
180 October 13
181 May 6
182 November 10
183 May 15
184 October 26
185 December 14
186 December 3
187 March 26
188 May 18
189 March 2
190 November 16
191 June 8
192 November 9
193 April 2
194 November 12
195 March 10
196 April 8
197 June 6
198 March 19
199 November 21
200 May 28
201 April 22
202 March 20
203 February 26
204 February 25
205 December 10
206 February 20
207 November 6
208 March 16
209 October 25
210 March 24
211 May 27
212 October 23
213 February 23
214 February 11
215 June 7
216 October 17
217 December 9
218 February 22
219 October 19
220 December 31
221 December 8
222 November 2
223 April 15
224 December 22
225 March 27
226 April 7
227 March 31
228 March 6
229 May 7
230 April 23
231 November 30
232 February 17
233 November 1
234 May 29
235 March 1
236 November 7
237 February 18
238 November 15
239 October 18
240 January 20
241 November 8
242 May 1
243 April 16
244 February 16
245 February 9
246 February 19
247 February 27
248 February 15
249 May 13
250 February 28
251 May 11
252 October 30
253 February 2
254 March 21
255 March 23
256 February 3
257 April 14
258 May 17
259 April 21
260 January 14
261 March 22
262 January 27
263 November 14
264 March 15
265 March 8
266 December 12
267 March 30
268 March 9
269 October 24
270 April 28
271 January 22
272 May 16
273 May 10
274 April 9
275 March 29
276 May 8
277 April 4
278 April 3
279 January 21
280 January 28
281 February 4
282 April 29
283 December 4
284 December 7
285 January 29
286 April 6
287 February 5
288 April 30
289 May 26
290 March 7
291 May 4
292 February 21
293 February 6
294 January 23
295 December 11
296 April 10
297 March 28
298 January 26
299 January 25
300 March 14
301 January 6
302 January 19
303 June 13
304 January 15
305 May 2
306 January 12
307 April 24
308 February 8
309 April 17
310 April 20
311 May 25
312 November 13
313 April 27
314 January 30
315 April 12
316 January 13
317 January 18
318 December 6
319 May 31
320 December 5
321 July 5
322 January 16
323 April 18
324 January 7
325 April 25
326 May 9
327 April 26
328 May 30
329 May 3
330 February 1
331 February 13
332 February 7
333 January 24
334 March 13
335 April 11
336 April 5
337 January 17
338 January 5
339 April 19
340 November 22
341 January 11
342 December 13
343 January 31
344 November 23
345 November 29
346 April 13
347 January 8
348 April 1
349 January 10
350 January 4
351 January 9
352 November 24
353 November 25
354 December 23
355 October 31
356 January 3
357 November 26
358 November 27
359 November 28
360 December 26
361 July 4
362 January 2
363 December 24
364 January 1
365 December 25
366 February 29

Data source: NYTimes.com, Amitabh Chandra, Harvard University