Born On Box

Most common birthdays

Every birthday ranked from most to least common, using an average of 21 years of US birth records.

The most common birthday is

September 9

About 12,344 US births a year. The least common is December 25 (not counting February 29).

Top 10

  1. September 9: 12,344
  2. September 19: 12,285
  3. September 12: 12,282
  4. September 17: 12,201
  5. September 10: 12,190
  6. September 20: 12,162
  7. July 7: 12,147
  8. September 15: 12,126
  9. September 16: 12,114
  10. September 18: 12,112

Rarest 10

  1. February 29: 2,503
  2. December 25: 6,601
  3. January 1: 7,827
  4. December 24: 8,103
  5. July 4: 8,825
  6. January 2: 9,356
  7. December 26: 9,599
  8. November 27: 9,770
  9. November 23: 9,919
  10. November 25: 10,001

Months by births per day

  1. September: 11,811 a day
  2. August: 11,712 a day
  3. July: 11,563 a day
  4. June: 11,306 a day
  5. October: 11,204 a day
  6. May: 11,022 a day
  7. December: 10,991 a day
  8. March: 10,979 a day
  9. February: 10,976 a day
  10. November: 10,927 a day
  11. April: 10,874 a day
  12. January: 10,721 a day

Every birthday ranked

RankBirthdayAverage US births a year
1 September 9 12,344
2 September 19 12,285
3 September 12 12,282
4 September 17 12,201
5 September 10 12,190
6 September 20 12,162
7 July 7 12,147
8 September 15 12,126
9 September 16 12,114
10 September 18 12,112
11 December 20 12,064
12 September 26 12,047
13 September 8 12,029
14 September 23 12,017
15 August 8 12,006
16 December 29 12,004
17 December 19 11,998
18 September 24 11,993
19 July 8 11,980
20 August 29 11,977
21 August 15 11,974
22 September 22 11,960
23 December 30 11,932
24 September 25 11,921
25 September 14 11,918
26 August 28 11,910
27 September 27 11,906
28 December 28 11,901
29 July 1 11,897
30 July 2 11,875
31 August 22 11,875
32 September 21 11,856
33 September 13 11,850
34 July 11 11,847
35 August 30 11,846
36 August 16 11,831
37 August 20 11,825
38 August 1 11,824
39 July 18 11,820
40 July 9 11,810
41 July 16 11,808
42 July 25 11,803
43 July 15 11,794
44 August 12 11,790
45 July 10 11,787
46 August 27 11,782
47 October 1 11,771
48 July 17 11,770
49 August 9 11,762
50 July 23 11,744
51 August 14 11,744
52 December 18 11,736
53 July 22 11,727
54 October 3 11,727
55 December 21 11,727
56 December 27 11,724
57 August 18 11,719
58 July 14 11,716
59 July 21 11,701
60 August 21 11,697
61 August 23 11,696
62 February 14 11,686
63 August 19 11,677
64 August 26 11,657
65 July 24 11,654
66 August 5 11,650
67 July 28 11,645
68 August 11 11,644
69 July 30 11,642
70 August 7 11,638
71 June 27 11,633
72 October 2 11,632
73 August 6 11,630
74 August 2 11,629
75 July 29 11,627
76 November 21 11,625
77 July 26 11,617
78 August 25 11,615
79 September 29 11,613
80 October 10 11,613
81 July 12 11,609
82 August 4 11,605
83 June 28 11,597
84 September 28 11,594
85 August 31 11,592
86 July 19 11,588
87 August 17 11,588
88 June 30 11,580
89 May 23 11,574
90 July 31 11,564
91 September 11 11,561
92 June 20 11,545
93 December 17 11,539
94 October 4 11,532
95 September 30 11,531
96 August 10 11,527
97 July 6 11,522
98 August 13 11,512
99 December 12 11,505
100 November 20 11,503
101 August 24 11,489
102 September 5 11,489
103 July 20 11,466
104 July 27 11,447
105 June 25 11,444
106 September 7 11,437
107 December 22 11,432
108 June 26 11,426
109 May 24 11,404
110 November 1 11,401
111 December 16 11,395
112 June 29 11,387
113 June 2 11,385
114 June 18 11,375
115 October 6 11,371
116 August 3 11,367
117 June 24 11,365
118 October 7 11,364
119 November 7 11,358
120 October 8 11,353
121 July 3 11,352
122 October 17 11,351
123 September 6 11,343
124 June 21 11,338
125 May 16 11,330
126 May 22 11,330
127 October 24 11,328
128 June 14 11,325
129 October 5 11,312
130 October 11 11,311
131 October 15 11,308
132 May 21 11,298
133 November 19 11,298
134 November 14 11,297
135 June 6 11,295
136 June 16 11,294
137 December 1 11,293
138 June 17 11,292
139 June 3 11,290
140 June 23 11,278
141 November 15 11,278
142 September 4 11,267
143 April 4 11,264
144 June 4 11,262
145 June 10 11,257
146 June 12 11,247
147 November 5 11,239
148 December 2 11,238
149 March 21 11,233
150 December 15 11,232
151 May 20 11,231
152 October 25 11,230
153 February 15 11,229
154 November 8 11,228
155 June 19 11,221
156 November 18 11,217
157 July 13 11,215
158 June 5 11,207
159 May 15 11,203
160 October 22 11,203
161 June 11 11,202
162 June 7 11,199
163 June 1 11,198
164 October 18 11,196
165 February 7 11,194
166 December 3 11,194
167 December 5 11,190
168 October 9 11,189
169 October 14 11,189
170 November 11 11,182
171 March 17 11,176
172 November 4 11,172
173 November 17 11,171
174 November 3 11,169
175 October 16 11,167
176 March 1 11,166
177 May 17 11,163
178 June 22 11,163
179 September 3 11,163
180 March 14 11,160
181 May 2 11,160
182 February 22 11,151
183 October 28 11,142
184 March 7 11,136
185 November 6 11,136
186 November 2 11,128
187 November 12 11,123
188 March 3 11,115
189 June 9 11,114
190 June 15 11,111
191 May 10 11,110
192 May 14 11,109
193 October 20 11,109
194 May 5 11,108
195 April 11 11,106
196 February 8 11,104
197 February 28 11,101
198 October 23 11,100
199 October 21 11,097
200 January 24 11,096
201 March 28 11,089
202 June 13 11,084
203 May 9 11,083
204 November 10 11,075
205 January 10 11,072
206 October 27 11,068
207 January 4 11,064
208 November 16 11,063
209 March 20 11,058
210 June 8 11,058
211 October 29 11,056
212 February 11 11,054
213 February 21 11,054
214 March 15 11,054
215 February 10 11,051
216 April 2 11,049
217 March 12 11,048
218 October 12 11,048
219 May 12 11,047
220 May 1 11,046
221 April 18 11,045
222 April 25 11,042
223 September 2 11,042
224 December 4 11,038
225 May 19 11,032
226 March 4 11,027
227 January 11 11,020
228 March 5 11,018
229 March 8 11,017
230 January 14 11,016
231 February 25 11,016
232 March 25 11,010
233 December 6 11,004
234 December 10 11,004
235 March 22 11,003
236 May 8 11,002
237 February 2 10,999
238 January 25 10,995
239 April 12 10,994
240 December 14 10,993
241 January 5 10,992
242 March 18 10,990
243 May 6 10,985
244 February 16 10,983
245 May 7 10,983
246 February 18 10,978
247 January 12 10,976
248 March 10 10,974
249 February 1 10,970
250 October 26 10,968
251 March 11 10,967
252 March 6 10,966
253 November 9 10,965
254 January 7 10,963
255 September 1 10,963
256 February 23 10,962
257 March 19 10,955
258 January 17 10,954
259 March 24 10,952
260 April 16 10,950
261 February 12 10,945
262 February 4 10,944
263 April 3 10,944
264 May 3 10,944
265 December 11 10,944
266 May 30 10,943
267 January 6 10,942
268 April 17 10,942
269 February 24 10,939
270 March 27 10,937
271 April 19 10,936
272 April 5 10,935
273 February 20 10,932
274 December 8 10,932
275 March 26 10,931
276 February 9 10,929
277 May 18 10,929
278 January 18 10,927
279 January 31 10,927
280 April 8 10,925
281 April 26 10,921
282 April 15 10,919
283 January 23 10,913
284 April 22 10,910
285 March 29 10,906
286 December 13 10,903
287 April 23 10,901
288 February 27 10,898
289 November 30 10,898
290 December 9 10,893
291 February 17 10,889
292 April 7 10,889
293 April 24 10,889
294 October 19 10,888
295 February 3 10,878
296 January 26 10,876
297 January 28 10,875
298 April 9 10,873
299 October 30 10,872
300 April 10 10,871
301 January 3 10,869
302 January 21 10,866
303 January 20 10,864
304 May 25 10,861
305 January 27 10,858
306 April 21 10,846
307 April 14 10,844
308 March 2 10,841
309 February 6 10,837
310 May 28 10,833
311 April 28 10,831
312 May 29 10,823
313 November 29 10,809
314 March 31 10,807
315 March 16 10,805
316 March 9 10,801
317 October 13 10,800
318 November 13 10,797
319 January 30 10,794
320 December 7 10,783
321 May 11 10,774
322 April 30 10,772
323 February 26 10,771
324 March 23 10,771
325 April 29 10,767
326 May 31 10,757
327 April 20 10,747
328 May 4 10,746
329 March 30 10,743
330 January 19 10,733
331 May 13 10,729
332 February 5 10,727
333 May 27 10,720
334 January 22 10,719
335 February 19 10,710
336 November 22 10,709
337 March 13 10,697
338 April 27 10,694
339 January 9 10,672
340 January 16 10,669
341 April 6 10,669
342 January 13 10,657
343 January 8 10,656
344 February 13 10,647
345 January 29 10,611
346 January 15 10,589
347 July 5 10,442
348 December 31 10,433
349 May 26 10,425
350 April 13 10,416
351 December 23 10,383
352 April 1 10,335
353 November 28 10,141
354 November 26 10,092
355 November 24 10,053
356 October 31 10,030
357 November 25 10,001
358 November 23 9,919
359 November 27 9,770
360 December 26 9,599
361 January 2 9,356
362 July 4 8,825
363 December 24 8,103
364 January 1 7,827
365 December 25 6,601
366 February 29 2,503

February 29 is averaged over all years, including the three in four that don’t have one.

Questions

What is the most common birthday?
September 9 is the most common birthday in the US, with about 12,344 babies born on it each year. Nine of the ten most common birthdays are in September.
What is the least common birthday?
Leaving out February 29, which only comes every four years, the rarest birthday is December 25, followed by January 1 and December 24. Fewer births are scheduled on holidays.
Why are so many people born in September?
September births were conceived around the winter holidays in December. Planned births also cluster on weekdays and away from holidays, which shifts the numbers around the calendar.
Where does this data come from?
US birth records from 1994 to 2014: the CDC’s National Center for Health Statistics for 1994–1999 and the Social Security Administration for 2000–2014, as published by FiveThirtyEight.