Baby Names US
boys' name ★ peaked 2025

Kaius

Gender Boy Rank 2025 #1,029 Trend ↑ Rising 26%
Rank 2025
#1,029
among boys · ↑106 vs 2024
Babies in 2025
216
named Kaius · +16% vs 2024
How common
1 in 7,908
boys born in 2025
Peak year
2025
216 babies
All-time total
2,011
#3,288 all-time among boys
First recorded
2005
in Social Security records

Kaius popularity over time

2,011 babies have been named Kaius since 2005, 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
0.040.080.110.1518801900192019401960198020002020Peak 2025Boys

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 – – – –
2000s 54 5 – #5,925
2010s 807 81 +1394% #1,155
2020s (to 2025) 1,150 192 +138% #1,023

Where Kaius 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 228 0.13 outside top 500
2027 239 0.14 outside top 500
2028 248 0.15 outside top 500
2029 257 0.15 outside top 500
2030 264 0.15 outside top 500

Where Kaius is most popular

Boys named Kaius per 1,000 boys born in each state, 2021–2025. National average: 0.110 per 1,000. Strongest in Hawaii, Missouri, and South Carolina.

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 Kaius 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
Hawaii 5 0.322 +193%
Missouri 26 0.188 +71%
South Carolina 17 0.165 +50%
North Carolina 41 0.161 +46%
Wisconsin 19 0.160 +46%
Arizona 23 0.141 +28%
Illinois 33 0.129 +18%
Colorado 16 0.124 +13%
Washington 20 0.122 +11%
Texas 105 0.119 +9%
Ohio 31 0.117 +7%
Indiana 18 0.112 ≈ national
Georgia 28 0.111 ≈ national
Florida 51 0.108 ≈ national
New York 43 0.099 -10%
California 86 0.094 -14%
Mississippi 5 0.088 -20%
Nevada 5 0.088 -20%
Minnesota 10 0.082 -26%
Virginia 13 0.069 -38%
Pennsylvania 18 0.068 -38%
Alabama 7 0.064 -42%
Louisiana 6 0.059 -47%
Maryland 5 0.042 -62%
Tennessee 6 0.033 -70%
New Jersey 5 0.025 -77%
Michigan 5 0.024 -78%
Alaska – – –
Arkansas – – –
Connecticut – – –
District of Columbia – – –
Delaware – – –
Iowa – – –
Idaho – – –
Kansas – – –
Kentucky – – –
Massachusetts – – –
Maine – – –
Montana – – –
North Dakota – – –
Nebraska – – –
New Hampshire – – –
New Mexico – – –
Oklahoma – – –
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 Kaius

Kaius is uncommon for boys in the United States, ranked #1,029 in 2025 with 216 babies given the name. It is currently rising compared with a decade ago.

Since 2005, 2,011 American babies have been named Kaius. Its peak came in 2025, when 216 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 Kaius stood among all boys' names in any year, or use the compare tool to plot it against other names.

How old are people named Kaius?

The median living Kaius is about 5 years old; half are between 2 and 8. An estimated 2,000 people named Kaius are alive in the United States today.

median 5 020406080100

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

Kaius year by year

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

Year Boys Boys rank
2025 216 #1,029
2024 186 #1,135
2023 189 #1,121
2022 177 #1,163
2021 180 #1,132
2020 202 #1,023
2019 169 #1,155
2018 115 #1,502
2017 94 #1,691
2016 114 #1,496
2015 110 #1,508
2014 85 #1,773
2013 45 #2,645
2012 34 #3,271
2011 27 #3,844
2010 14 #6,207
2009 15 #5,949
2008 15 #5,925
2007 10 #7,882
2006 7 #10,119
2005 7 #9,626
2004 – –
2003 – –
2002 – –
2001 – –
2000 – –
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 Kaius, drawn from the same Social Security data as the charts above.

How old is the average Kaius?

The median living Kaius is about 5 years old. Half of all living Kaiuss are between 2 and 8 years old.

How many people named Kaius are alive today?

An estimated 2,000 people named Kaius are alive in the United States, based on 2,011 recorded births and Social Security life tables.

How popular is the name Kaius in 2025?

Kaius ranked #1,029 among boys' names in the United States in 2025, with 216 babies given the name, according to Social Security Administration data.

How many people are named Kaius?

2,011 babies have been named Kaius in the United States since 2005, based on Social Security card applications.

When was the name Kaius most popular?

Kaius peaked in 2025, when 216 newborns received the name.

Is Kaius a boy or girl name?

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

Is the name Kaius rising or falling?

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

Will Kaius become more popular?

Kaius is trending upward. If the recent trend holds, we project roughly 264 boys named Kaius in 2030, which would rank outside the top 500. Forecasts assume the current trend continues and become less certain further out.

Names like Kaius

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

Compare Kaius with similar names → More names starting with K →