Is September 12 a rare birthday? Very common
More common than 98% of all 366 dates.
September 12 in numbers
The odds, the star sign and the other dates that come with it.
Where September 12 ranks
From most common birthday to rarest, September 12 ranks in position #7, with 11,766 births a year. 359 other dates are rarer. 11 dates are within 1% of its count, anywhere from #2 to #13, so the exact position is a close thing.
September 12 through the years
Where it ranked in the United States, year by year.
common
September 12 in other countries
September 12 is the 7th most common birthday in the United States. It is among the 50 most common in 14 of the 26 other countries, and ranges from #2 in Chile and the Netherlands to #163 in Argentina.
Chile
#2 of 366
799 births on an average September 12
DEIS, 1990–2017Netherlands
#2 of 366
544 births on an average September 12
CBS, 1995–2025Ecuador
#3 of 366
826 births on an average September 12
INEC, 2013–2023Mexico
#5 of 366
6,011 births on an average September 12
INEGI, 2017–2023Guatemala
#8 of 366
1,073 births on an average September 12
INE Guatemala, 2018–2024Philippines
#8 of 366
5,307 births on an average September 12
PSA, 2006–2024Slovenia
#8 of 366
60 births on an average September 12
SURS, 2000–2025Costa Rica
#12 of 366
185 births on an average September 12
INEC Costa Rica, 2014–2024Portugal
#13 of 366
320 births on an average September 12
INE Portugal, 1980–2025Malaysia
#20 of 366
1,494 births on an average September 12
DOSM, 2000–2022England & Wales
#21 of 366
1,864 births on an average September 12
ONS, 1995–2025Japan
#27 of 366
2,960 births on an average September 12
e-Stat, 1996–2025New Zealand
#43 of 366
163 births on an average September 12
Stats NZ, 1980–2023Germany
#46 of 366
2,207 births on an average September 12
Destatis, 2014–2025Hungary
#54 of 366
343 births on an average September 12
KSH, 1970–2020Peru
#56 of 366
1,256 births on an average September 12
INEI, 2019–2025France
#69 of 366
2,214 births on an average September 12
INSEE, 1998–2024Switzerland
#92 of 366
227 births on an average September 12
FSO, 1969–2025Belgium
#100 of 366
333 births on an average September 12
Statbel, 1992–2025Ireland
#112 of 366
170 births on an average September 12
CSO, 1980–2023Latvia
#115 of 366
55 births on an average September 12
CSB, 1996–2025Brazil
#116 of 366
8,234 births on an average September 12
DATASUS, 1997–2024Denmark
#117 of 366
170 births on an average September 12
Statistics Denmark, 2007–2025Finland
#133 of 366
144 births on an average September 12
Statistics Finland, 2010–2025Norway
#145 of 366
160 births on an average September 12
SSB, 2011–2025Argentina
#163 of 366
1,531 births on an average September 12
DEIS, 2018–2023
Famous people born on September 12
Ranked by how often people looked them up on Wikipedia last year.
Sydney SweeneyAmerican actress · born 1997
Paul WalkerAmerican actor · born 1973
Hans ZimmerGerman film composer · born 1957
Emmy RossumAmerican actress · born 1986
Kelsea BalleriniAmerican country singer and songwriter · born 1993
Freddie FreemanCanadian-American baseball player · born 1989
DruskiAmerican comedian, actor, and influencer · born 1994
Jennifer HudsonAmerican singer and actress · born 1981September against the other eleven
September 12 is the 5th 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 12?
About 11,766 a year in the United States. It was at its most common in 2002, when 13,982 babies were born and it ranked #1 of 365; at its rarest in 2010, with 7,660 births at #310.
Is September 12 a common birthday?
In the United States, September 12 is the 7th most common of 366 dates, with about 11,766 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. 11 other dates are within 1% of September 12's count, spread from #2 to #13, 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 12 rarer in other countries?
In some. It is rarer in 22 of the 26 other countries we hold daily records for. It is at its rarest in Argentina, at #163 of 366, and at its most common in Chile and the Netherlands, at #2.
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