Baby Names US
Unisex name ★ peaked 2025

Sekai

Gender Unisex · 24% girls Rank 2025 #2,444 Trend ↑ Rising 609%
Rank 2025
#2,444
among boys · ↑820 vs 2024
Babies in 2025
62
named Sekai · +68% vs 2024
How common
1 in 30,501
boys born in 2025
Peak year
2025
62 babies
All-time total
372
#10,669 all-time among boys
First recorded
2000
in Social Security records

Sekai popularity over time

372 babies have been named Sekai since 2000, 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
0.010.020.030.0418801900192019401960198020002020BoysGirls
BoysGirls

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 – – – – – –
1980s – – – – – –
1990s – – – – – –
2000s 57 46 103 10 – #7,162
2010s 6 53 59 6 -43% #8,040
2020s (to 2025) 25 185 210 35 +493% #2,444

Where Sekai 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 72 0.04 outside top 500
2027 90 0.05 outside top 500
2028 108 0.06 outside top 500
2029 126 0.07 outside top 500
2030 144 0.08 outside top 500

The story of Sekai

Sekai is rare for boys in the United States, ranked #2,444 in 2025 with 56 babies given the name. It is currently rising compared with a decade ago.

Since 2000, 372 American babies have been named Sekai, about 76% boys and 24% girls, making it a genuinely unisex name. Its peak came in 2025, when 62 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 Sekai stood among all boys' names in any year, or use the compare tool to plot it against other names.

How old are people named Sekai?

The median living Sekai is about 4 years old; half are between 1 and 16. An estimated 400 people named Sekai are alive in the United States today.

median 4 020406080100

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

Sekai 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 6 #14,662 56 #2,444
2024 – – 37 #3,264
2023 6 #14,897 41 #3,053
2022 7 #13,363 30 #3,758
2021 6 #14,977 12 #7,027
2020 – – 9 #8,615
2019 – – 10 #8,113
2018 – – – –
2017 – – 10 #8,040
2016 – – 9 #8,695
2015 – – 5 #13,711
2014 – – – –
2013 6 #16,217 – –
2012 – – 6 #12,029
2011 – – 6 #12,014
2010 – – 7 #10,563
2009 5 #19,711 12 #7,162
2008 5 #19,970 6 #12,305
2007 5 #20,031 – –
2006 10 #11,274 5 #13,667
2005 7 #14,238 10 #7,555
2004 7 #13,935 – –
2003 6 #15,418 6 #10,654
2002 – – – –
2001 5 #17,458 7 #9,067
2000 7 #12,893 – –
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 Sekai, drawn from the same Social Security data as the charts above.

How old is the average Sekai?

The median living Sekai is about 4 years old. Half of all living Sekais are between 1 and 16 years old.

How many people named Sekai are alive today?

An estimated 400 people named Sekai are alive in the United States, based on 372 recorded births and Social Security life tables.

How popular is the name Sekai in 2025?

Sekai ranked #2,444 among boys' names in the United States in 2025, with 56 babies given the name, according to Social Security Administration data.

How many people are named Sekai?

372 babies have been named Sekai in the United States since 2000, based on Social Security card applications.

When was the name Sekai most popular?

Sekai peaked in 2025, when 62 newborns received the name.

Is Sekai a boy or girl name?

Sekai is used for both: about 24% of babies named Sekai have been girls and 76% boys.

Is the name Sekai rising or falling?

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

Will Sekai become more popular?

Sekai is trending upward. If the recent trend holds, we project roughly 144 boys named Sekai in 2030, which would rank outside the top 500. Forecasts assume the current trend continues and become less certain further out.

Names like Sekai

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

Compare Sekai with similar names → More names starting with S →