Is January 21 a rare birthday? Rare
Rarer than 92% of all 366 dates.
January 21 in numbers
The odds, the star sign and the other dates that come with it.
Where January 21 ranks
From most common birthday to rarest, January 21 ranks in position #335, with 10,393 births a year. 334 other dates are more common. 37 dates are within 1% of its count, anywhere from #312 to #349, so the exact position is a close thing.
January 21 through the years
Where it ranked in the United States, year by year.
common
January 21 in other countries
January 21 is the 32nd rarest birthday in the United States. It is among the 50 rarest in 4 of the 26 other countries, and ranges from #55 in Japan to #354 in England & Wales.
Japan
#55 of 366
2,909 births on an average January 21
e-Stat, 1996–2025Chile
#62 of 366
713 births on an average January 21
DEIS, 1990–2017Argentina
#120 of 366
1,581 births on an average January 21
DEIS, 2018–2023Philippines
#141 of 366
4,548 births on an average January 21
PSA, 2006–2024Hungary
#147 of 366
329 births on an average January 21
KSH, 1970–2020France
#172 of 366
2,152 births on an average January 21
INSEE, 1998–2024Belgium
#173 of 366
327 births on an average January 21
Statbel, 1992–2025Peru
#174 of 366
1,206 births on an average January 21
INEI, 2019–2025Slovenia
#176 of 366
53 births on an average January 21
SURS, 2000–2025New Zealand
#182 of 366
157 births on an average January 21
Stats NZ, 1980–2023Brazil
#188 of 366
7,978 births on an average January 21
DATASUS, 1997–2024Portugal
#190 of 366
297 births on an average January 21
INE Portugal, 1980–2025Switzerland
#203 of 366
222 births on an average January 21
FSO, 1969–2025Netherlands
#218 of 366
493 births on an average January 21
CBS, 1995–2025Mexico
#244 of 366
4,890 births on an average January 21
INEGI, 2017–2023Germany
#260 of 366
1,956 births on an average January 21
Destatis, 2014–2025Ireland
#261 of 366
165 births on an average January 21
CSO, 1980–2023Finland
#273 of 366
137 births on an average January 21
Statistics Finland, 2010–2025Norway
#283 of 366
146 births on an average January 21
SSB, 2011–2025Latvia
#285 of 366
51 births on an average January 21
CSB, 1996–2025Ecuador
#290 of 366
731 births on an average January 21
INEC, 2013–2023Denmark
#293 of 366
158 births on an average January 21
Statistics Denmark, 2007–2025Guatemala
#328 of 366
900 births on an average January 21
INE Guatemala, 2018–2024Malaysia
#336 of 366
1,326 births on an average January 21
DOSM, 2000–2022Costa Rica
#342 of 366
157 births on an average January 21
INEC Costa Rica, 2014–2024England & Wales
#354 of 366
1,726 births on an average January 21
ONS, 1995–2025
Famous people born on January 21
Ranked by how often people looked them up on Wikipedia last year.
Ilia TopuriaGeorgian and Spanish mixed martial artist · born 1997
IShowSpeedAmerican influencer and streamer · born 2005
Grigori RasputinRussian mystic · born 1869
Luke LittlerEnglish darts player · born 2007
Geena DavisAmerican actor · born 1956
Luke GrimesAmerican actor and musician · born 1984
Jack NicklausAmerican professional golfer · born 1940
Marco AsensioSpanish footballer · born 1996January against the other eleven
January 21 is the 10th rarest of the 31 days in January. All January birthdays.
January is the rarest month of the year
An average January day sees 10,394 births in the United States. September is the busiest month, January the quietest.
Quick answers
How many babies are born on January 21?
About 10,393 a year in the United States. It was at its most common in 1971, when 10,492 babies were born and it ranked #64 of 365; at its rarest in 1979, with 8,019 births at #355.
Is January 21 a common birthday?
In the United States, January 21 is the 32nd rarest of 366 dates, with about 10,393 births a year. That puts it on the rarer side of the calendar.
What is the rarest January birthday?
In the United States, January 1: the 2nd rarest of all 366 dates, with about 7,731 births a year. The most common January birthday is January 4, the 179th most common of the year.
How precise is the ranking?
In the middle of the calendar it is not exact. 37 other dates are within 1% of January 21's count, spread from #312 to #349, 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 January 21 rarer in other countries?
In some. It is rarer in 3 of the 26 other countries we hold daily records for. It is at its rarest in England & Wales, at #354 of 366, and at its most common in Japan, at #55.
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