Cailyn: Name Popularity, History & Rankings (1880

Rank 2025

#3,728

among girls · ↓435 vs 2024

Babies in 2025

named Cailyn · -6% vs 2024

How common

1 in 40,182

girls born in 2025

Peak year

2009

401 babies

All-time total

5,554

#2,398 all-time among girls

First recorded

1979

in Social Security records

Cailyn popularity over time

5,554 babies have been named Cailyn since 1979, according to official Social Security records. Switch measure to see births per year or the yearly rank.

Measure

Births per 1,000 babies of that sex, comparable across eras

GirlsBoys

By decade. Change compares yearly averages, so the current partial decade is on equal footing. Best rank is the name's best yearly rank within the decade.

Decade	Girls	Boys	Total	Per year	Change	Best rank
1880s	–	–	–	–	–	–
1890s	–	–	–	–	–	–
1900s	–	–	–	–	–	–
1910s	–	–	–	–	–	–
1920s	–	–	–	–	–	–
1930s	–	–	–	–	–	–
1940s	–	–	–	–	–	–
1950s	–	–	–	–	–	–
1960s	–	–	–	–	–	–
1970s	5	–	5	1	–	#10,396
1980s	120	–	120	12	+2300%	#3,493
1990s	857	–	857	86	+614%	#1,185
2000s	2,445	–	2,445	245	+185%	#725
2010s	1,791	–	1,791	179	-27%	#836
2020s (to 2025)	331	5	336	56	-69%	#2,474

Where Cailyn is heading

A five-year projection from the recent trend in births per 1,000 girls (damped so it flattens over time), converted to babies at today's birth totals. The implied rank places that projection in the 2025 field. A projection, not a promise: real trends bend.

Year	Projected babies	Per 1,000 girls	Implied rank
2026	38	0.02	outside top 500
2027	36	0.02	outside top 500
2028	35	0.02	outside top 500
2029	33	0.02	outside top 500
2030	32	0.02	outside top 500

The story of Cailyn

Cailyn is rare for girls in the United States, ranked #3,728 in 2025 with 40 babies given the name. It is currently declining compared with a decade ago.

Since 1979, 5,554 American babies have been named Cailyn. Its peak came in 2009, when 401 newborns received the name, the signature sound of the 2000s.

The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Cailyn stood among all girls' names in any year, or use the compare tool to plot it against other names.

How old are people named Cailyn?

The median living Cailyn is about 17 years old; half are between 13 and 23. An estimated 5,500 people named Cailyn are alive in the United States today.

Estimated from births per year and Social Security period life tables; an approximation of the living age distribution, by age in years.

Cailyn year by year

Every year since 2001, and five-year steps back to 1880. Rank is within each sex.

Year	Girls	Girls rank	Boys	Boys rank
2025	40	#3,728	5	#12,347
2024	48	#3,293	–	–
2023	53	#3,105	–	–
2022	65	#2,666	–	–
2021	55	#3,011	–	–
2020	70	#2,474	–	–
2019	70	#2,513	–	–
2018	67	#2,588	–	–
2017	87	#2,186	–	–
2016	114	#1,818	–	–
2015	177	#1,339	–	–
2014	178	#1,328	–	–
2013	219	#1,112	–	–
2012	256	#985	–	–
2011	301	#869	–	–
2010	322	#836	–	–
2009	401	#725	–	–
2008	399	#742	–	–
2007	276	#974	–	–
2006	306	#870	–	–
2005	209	#1,125	–	–
2004	206	#1,107	–	–
2003	186	#1,161	–	–
2002	172	#1,189	–	–
2001	127	#1,477	–	–
2000	163	#1,219	–	–
1995	88	#1,674	–	–
1990	44	#2,649	–	–
1985	18	#4,299	–	–
1980	–	–	–	–
1975	–	–	–	–
1970	–	–	–	–
1965	–	–	–	–
1960	–	–	–	–
1955	–	–	–	–
1950	–	–	–	–
1945	–	–	–	–
1940	–	–	–	–
1935	–	–	–	–
1930	–	–	–	–
1925	–	–	–	–
1920	–	–	–	–
1915	–	–	–	–
1910	–	–	–	–
1905	–	–	–	–
1900	–	–	–	–
1895	–	–	–	–
1890	–	–	–	–
1885	–	–	–	–
1880	–	–	–	–

Frequently asked questions

Quick answers about Cailyn, drawn from the same Social Security data as the charts above.

How old is the average Cailyn?

The median living Cailyn is about 17 years old. Half of all living Cailyns are between 13 and 23 years old.

How many people named Cailyn are alive today?

An estimated 5,500 people named Cailyn are alive in the United States, based on 5,554 recorded births and Social Security life tables.

How popular is the name Cailyn in 2025?

Cailyn ranked #3,728 among girls' names in the United States in 2025, with 40 babies given the name, according to Social Security Administration data.

How many people are named Cailyn?

5,554 babies have been named Cailyn in the United States since 1979, based on Social Security card applications.

When was the name Cailyn most popular?

Cailyn peaked in 2009, when 401 newborns received the name.

Is Cailyn a boy or girl name?

Cailyn is overwhelmingly a girl's name: 100% of babies with the name.

Is the name Cailyn rising or falling?

Cailyn is declining, less popular now than a decade ago.

Will Cailyn become more popular?

Cailyn is trending downward. If the recent trend holds, we project roughly 32 girls named Cailyn in 2030, which would rank outside the top 500. Forecasts assume the current trend continues and become less certain further out.

Names like Cailyn

Names that sound and feel close to Cailyn: shared sounds, similar era, similar popularity. Each links to its full history.

Compare Cailyn with similar names → More names starting with C →