Is September 15 a rare birthday? Very common
More common than 97% of all 366 dates.
September 15 in numbers
The odds, the star sign and the other dates that come with it.
Where September 15 ranks
From most common birthday to rarest, September 15 ranks in position #11, with 11,710 births a year. 355 other dates are rarer. 14 dates are within 1% of its count, anywhere from #2 to #16, so the exact position is a close thing.
September 15 through the years
Where it ranked in the United States, year by year.
common
September 15 in other countries
September 15 is the 11th most common birthday in the United States. It is among the 50 most common in 13 of the 26 other countries, and ranges from #4 in Belgium and the Philippines to #269 in Argentina.
Belgium
#4 of 366
351 births on an average September 15
Statbel, 1992–2025Philippines
#4 of 366
5,361 births on an average September 15
PSA, 2006–2024Portugal
#5 of 366
327 births on an average September 15
INE Portugal, 1980–2025Malaysia
#7 of 366
1,526 births on an average September 15
DOSM, 2000–2022Chile
#10 of 366
777 births on an average September 15
DEIS, 1990–2017England & Wales
#18 of 366
1,878 births on an average September 15
ONS, 1995–2025New Zealand
#20 of 366
167 births on an average September 15
Stats NZ, 1980–2023Germany
#25 of 366
2,243 births on an average September 15
Destatis, 2014–2025Ecuador
#26 of 366
804 births on an average September 15
INEC, 2013–2023France
#35 of 366
2,246 births on an average September 15
INSEE, 1998–2024Hungary
#35 of 366
346 births on an average September 15
KSH, 1970–2020Mexico
#36 of 366
5,572 births on an average September 15
INEGI, 2017–2023Netherlands
#37 of 366
526 births on an average September 15
CBS, 1995–2025Switzerland
#60 of 366
230 births on an average September 15
FSO, 1969–2025Ireland
#72 of 366
172 births on an average September 15
CSO, 1980–2023Latvia
#80 of 366
56 births on an average September 15
CSB, 1996–2025Slovenia
#87 of 366
56 births on an average September 15
SURS, 2000–2025Costa Rica
#88 of 366
175 births on an average September 15
INEC Costa Rica, 2014–2024Peru
#111 of 366
1,226 births on an average September 15
INEI, 2019–2025Denmark
#122 of 366
169 births on an average September 15
Statistics Denmark, 2007–2025Finland
#126 of 366
144 births on an average September 15
Statistics Finland, 2010–2025Brazil
#127 of 366
8,194 births on an average September 15
DATASUS, 1997–2024Guatemala
#146 of 366
956 births on an average September 15
INE Guatemala, 2018–2024Japan
#206 of 366
2,764 births on an average September 15
e-Stat, 1996–2025Norway
#219 of 366
153 births on an average September 15
SSB, 2011–2025Argentina
#269 of 366
1,425 births on an average September 15
DEIS, 2018–2023
Famous people born on September 15
Ranked by how often people looked them up on Wikipedia last year.
Tom HardyEnglish actor · born 1977
Prince Harry, Duke of SussexBritish prince · born 1984
Agatha ChristieEnglish mystery and detective writer · born 1890
Tommy Lee JonesAmerican actor · born 1946
Jimmy CarrBritish and Irish comedian · born 1972
William Howard TaftPresident of the United States from 1909 to 1913 · born 1857
Marco PoloVenetian merchant, explorer, and writer · born 1254
Dennis SchröderGerman basketball player · born 1993September against the other eleven
September 15 is the 9th most common of the 30 days in September. All September birthdays.
September is the most common month of the year
An average September day sees 11,448 births in the United States. September is the busiest month, January the quietest.
Quick answers
How many babies are born on September 15?
About 11,710 a year in the United States. It was at its most common in 1972, when 10,279 babies were born and it ranked #1 of 366; at its rarest in 2024, with 7,262 births at #318.
Is September 15 a common birthday?
In the United States, September 15 is the 11th most common of 366 dates, with about 11,710 births a year. That puts it among the more common birthdays.
What is the rarest September birthday?
In the United States, September 2: the 118th rarest of all 366 dates, with about 10,653 births a year. The most common September birthday is September 9, the most common of the year.
How precise is the ranking?
In the middle of the calendar it is not exact. 14 other dates are within 1% of September 15's count, spread from #2 to #16, so the position inside that group would shift with a different set of years. That band is the accurate answer; the rank is the simple one. At the ends — Christmas Day, New Year's Day — nothing is close.
Is September 15 rarer in other countries?
In some. It is rarer in 21 of the 26 other countries we hold daily records for. It is at its rarest in Argentina, at #269 of 366, and at its most common in Belgium and the Philippines, at #4.
How this is counted
Every date is ranked by how many babies are born on it in the United States. Live births by day of birth from the CDC's National Center for Health Statistics, 1989–2024.
Updated October 2026