Sekai
Sekai was given to 56 boys in 2025, #2,444 among boys’ names; 372 Americans have been recorded with it since 2000 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Sekai by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Sekai?
#2,444 among boys’ names, 2025
Sekai rose from #13,705 in 2015 to #2,444 in 2025 among boys’ names; its share of boys born rose from 2.6 to 32.8 per million.
62 babies in 2025, the peak
Sekai peaked in 2025, when 62 babies were given it (56 boys, #2,444 among boys’ names). In 2024 it went to 37 boys.
Births by sex.
| Year | Girls | Girls’ rank | Boys | Boys’ rank |
|---|---|---|---|---|
| 2025 | 6 | #14,658 | 56 | #2,444 |
| 2024 | under 5 | 37 | #3,262 | |
| 2023 | 6 | #14,891 | 41 | #3,051 |
| 2022 | 7 | #13,358 | 30 | #3,756 |
| 2021 | 6 | #14,972 | 12 | #7,022 |
| 2020 | under 5 | 9 | #8,610 | |
| 2019 | under 5 | 10 | #8,108 | |
| 2017 | under 5 | 10 | #8,036 | |
| 2016 | under 5 | 9 | #8,690 | |
| 2015 | under 5 | 5 | #13,705 |
Every recorded year (23)
| Year | Girls | Girls’ rank | Boys | Boys’ rank |
|---|---|---|---|---|
| 2013 | 6 | #16,212 | under 5 | |
| 2012 | under 5 | 6 | #12,022 | |
| 2011 | under 5 | 6 | #12,007 | |
| 2010 | under 5 | 7 | #10,556 | |
| 2009 | 5 | #19,705 | 12 | #7,157 |
| 2008 | 5 | #19,964 | 6 | #12,298 |
| 2007 | 5 | #20,025 | under 5 | |
| 2006 | 10 | #11,269 | 5 | #13,660 |
| 2005 | 7 | #14,231 | 10 | #7,548 |
| 2004 | 7 | #13,929 | under 5 | |
| 2003 | 6 | #15,411 | 6 | #10,647 |
| 2001 | 5 | #17,451 | 7 | #9,060 |
| 2000 | 7 | #12,885 | under 5 |
Ranks: girls’ names and boys’ names ranked separately in each year’s SSA file; “under 5” is a year SSA did not list the name for that sex.
Is Sekai a boy’s or a girl’s name?
Of the 372 Americans recorded as Sekai, 24% are girls and 76% boys. In 2025 it went to 6 girls and 56 boys.
Years with fewer than 20 babies given the name are left blank.
Girls and boys named Sekai: the SSA national file counts each sex separately.
How many people are named Sekai, and how old are they?
An estimated 369 Americans named Sekai and born in the U.S. are alive in 2026 (99% of everyone recorded); the median is 5 years old and half are between 2 and 17. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 238 people named Sekai (107 women and girls, 131 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 162 born in the U.S. The Census count is 47% above that prediction. Possible reasons: the Census counts people born abroad, whom SSA’s files leave out, and it records the name people give, which SSA may have recorded under another spelling or as part of a compound name.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Names spelled alike
Of these 2 names spelled alike, given to 1,490 babies since 1880, Sekai is the second most given (25% of them). In 2025 it was given to 62 of their 97 babies (64%), the most given that year.
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Sekai
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Sekai and names like it
- Compare Sekai and SekouBirths, ranks, peak and the living estimate side by side.
- The most given names of the 2020sSekai peaked in 2025.
- Florida’s most given namesThe state where SSA recorded the most babies named Sekai since 1910.
- The top names of 2025The year the most babies were named Sekai.
- The names of Generation AlphaMost people named Sekai alive today were born 2013-2025.
- Names starting with SMost given first.