Caius: Name Popularity, History & Rankings (1880

Rank 2025

#927

among boys · ↑133 vs 2024

Babies in 2025

254

named Caius · +23% vs 2024

How common

1 in 6,725

boys born in 2025

Peak year

2025

254 babies

All-time total

2,329

#2,996 all-time among boys

First recorded

1994

in Social Security records

Caius popularity over time

2,329 babies have been named Caius since 1994, 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

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	Boys	Per year	Change	Best rank
1880s	–	–	–	–
1890s	–	–	–	–
1900s	–	–	–	–
1910s	–	–	–	–
1920s	–	–	–	–
1930s	–	–	–	–
1940s	–	–	–	–
1950s	–	–	–	–
1960s	–	–	–	–
1970s	–	–	–	–
1980s	–	–	–	–
1990s	12	1	–	#7,975
2000s	205	21	+1608%	#2,806
2010s	1,068	107	+421%	#1,224
2020s (to 2025)	1,044	174	+63%	#927

Where Caius is heading

A five-year projection from the recent trend in births per 1,000 boys (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 boys	Implied rank
2026	273	0.16	outside top 500
2027	290	0.17	outside top 500
2028	306	0.18	outside top 500
2029	320	0.19	outside top 500
2030	332	0.19	outside top 500

Where Caius is most popular

Boys named Caius per 1,000 boys born in each state, 2021–2025. National average: 0.103 per 1,000. Strongest in Oklahoma, Minnesota, and Wisconsin.

Vs national average

well below below near national above well above no data

All 50 states and DC, sorted by rate. Counts are boys named Caius born 2021–2025; the per-1,000 rate makes states of different sizes comparable, and the last column shows each state against the national average.

State	Boys 2021–2025	Per 1,000	vs national
Oklahoma	16	0.181	+76%
Minnesota	20	0.163	+59%
Wisconsin	17	0.144	+40%
Ohio	37	0.140	+36%
Tennessee	23	0.127	+24%
North Carolina	32	0.125	+22%
Colorado	16	0.124	+21%
California	104	0.114	+11%
Indiana	18	0.112	+9%
Maryland	13	0.109	+6%
South Carolina	11	0.106	≈ national
Arizona	17	0.104	≈ national
Pennsylvania	27	0.102	≈ national
Virginia	19	0.100	≈ national
Texas	84	0.095	-7%
New York	33	0.076	-26%
Georgia	19	0.075	-27%
Kansas	5	0.073	-29%
Alabama	7	0.064	-38%
Michigan	13	0.063	-38%
Florida	30	0.063	-38%
Illinois	15	0.059	-43%
Missouri	7	0.051	-51%
Washington	8	0.049	-52%
Massachusetts	6	0.044	-58%
New Jersey	6	0.030	-71%
Alaska	–	–	–
Arkansas	–	–	–
Connecticut	–	–	–
District of Columbia	–	–	–
Delaware	–	–	–
Hawaii	–	–	–
Iowa	–	–	–
Idaho	–	–	–
Kentucky	–	–	–
Louisiana	–	–	–
Maine	–	–	–
Mississippi	–	–	–
Montana	–	–	–
North Dakota	–	–	–
Nebraska	–	–	–
New Hampshire	–	–	–
New Mexico	–	–	–
Nevada	–	–	–
Oregon	–	–	–
Rhode Island	–	–	–
South Dakota	–	–	–
Utah	–	–	–
Vermont	–	–	–
West Virginia	–	–	–
Wyoming	–	–	–

State counts come from the Social Security Administration's state files, which omit any state-year with fewer than five babies of a name, so small states can undercount slightly.

The story of Caius

Caius is uncommon for boys in the United States, ranked #927 in 2025 with 254 babies given the name. It is currently rising compared with a decade ago.

Since 1994, 2,329 American babies have been named Caius. Its peak came in 2025, when 254 newborns received the name, the signature sound of the 2020s.

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 Caius stood among all boys' names in any year, or use the compare tool to plot it against other names.

How old are people named Caius?

The median living Caius is about 6 years old; half are between 2 and 11. An estimated 2,300 people named Caius 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.

Caius year by year

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

Year	Boys	Boys rank
2025	254	#927
2024	206	#1,060
2023	140	#1,347
2022	150	#1,282
2021	138	#1,341
2020	156	#1,209
2019	137	#1,328
2018	130	#1,361
2017	110	#1,512
2016	153	#1,224
2015	138	#1,289
2014	124	#1,377
2013	109	#1,494
2012	74	#1,924
2011	44	#2,709
2010	49	#2,520
2009	43	#2,806
2008	27	#3,840
2007	29	#3,610
2006	15	#5,557
2005	23	#3,958
2004	14	#5,537
2003	15	#5,072
2002	13	#5,439
2001	16	#4,703
2000	10	#6,382
1995	–	–
1990	–	–
1985	–	–
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 Caius, drawn from the same Social Security data as the charts above.

How old is the average Caius?

The median living Caius is about 6 years old. Half of all living Caiuss are between 2 and 11 years old.

How many people named Caius are alive today?

An estimated 2,300 people named Caius are alive in the United States, based on 2,329 recorded births and Social Security life tables.

How popular is the name Caius in 2025?

Caius ranked #927 among boys' names in the United States in 2025, with 254 babies given the name, according to Social Security Administration data.

How many people are named Caius?

2,329 babies have been named Caius in the United States since 1994, based on Social Security card applications.

When was the name Caius most popular?

Caius peaked in 2025, when 254 newborns received the name.

Is Caius a boy or girl name?

Caius is overwhelmingly a boy's name: 100% of babies with the name.

Is the name Caius rising or falling?

Caius is on the rise, noticeably more popular now than a decade ago.

Will Caius become more popular?

Caius is trending upward. If the recent trend holds, we project roughly 332 boys named Caius in 2030, which would rank outside the top 500. Forecasts assume the current trend continues and become less certain further out.

Names like Caius

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

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