Unisex name · since 1977
Kayin
548 babies named Kayin in U.S. Social Security records since 1977, with the highest year being 2001. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.
- #7,459 of 45,481
- all-time among boys
- #9,122 of 13,930
- 2025 SSA year
- 548
- born since 1977
- 2000s
- peak decade
Yes -- Kayin is the #9122 most popular unisex name in the U.S. today, with 548 recorded since 1977.
According to the U.S. Social Security Administration, Kayin has been recorded 548 times among boys since 1977, currently ranked #9122 nationally and more common than 35% of boys, with its heaviest use in the 2000s. This profile covers year-by-year birth trends, decade totals, and state-level distribution, all derived directly from SSA birth-registration files spanning 1977 to 2025.
- #7,459 of 45,481 all-time among boys
- #9,122 of 13,930 2025 SSA year
- 548 born since 1977
- 2000s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Kayin ranks #7,459 of 45,481 boys' names by all-time recorded births (highest first) and #9,122 of 13,930 among boys' names in 2025. 548 born since 1977, peaking in the 2000s.
- #7,459 of 45,481
- all-time among boys
- #9,122 of 13,930
- 2025 SSA year
- 548
- born since 1977
- 2000s
- peak decade
Kayin's 548 recorded births place it above 83.59% of the 45,481 boys names in the full SSA archive.
The state file records this name in 2 jurisdictions, led by California.
How Kayin compares
548 Top 42% higher than 58% of 13,930 names currently given to boys
Based on all-time total births among currently-ranked boys names. Names with fewer occurrences are grouped into wider buckets on the right.
Source U.S. Social Security Administration, national baby name data
How the numbers stack up
Kayin's all-time total is 49% above the median boys name, and Liam still leads by a wide margin.
| Metric | Kayin | Median boys name (Takari) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 548 | 369 | 358,536 |
| Peak-year births | 31 | 34 | 22,252 |
Kayin's usage pattern, beyond the headline number
Divide Kayin's SSA record in two at 2009 and the more recent half accounts for 41% of all births, the earlier half the remaining 59%, a genuinely balanced usage pattern. Its calmest year was 1977, with only 7 births recorded -- set against the 2001 peak of 31, that's the full swing in one name's fortunes.
Kayin popularity over time - boys
Annual U.S. births registered with the Social Security Administration · 1977–2025
- Peak year (2001)
- 31
- Annual births at peak, across 49 years of records
Kayin popularity over time - girls
82 total births recorded since 2001 (Kayin as girls' name)
Kayin by decade
2000s is the heaviest window (261 births, 48% of the file).
2000s was Kayin's strongest decade.
261 babies received the name during that ten-year window, about 48% of all-time use.
Kayin births by decade
Total births in each ten-year window
- 1970s 7
1970s
7 births
- 1990s 79
1990s
79 births
- 2000s
2000s
261 births
- 2010s
2010s
154 births
- 2020s 47
2020s
47 births
What this shows Peak: 2000s at 261 births (48% of all-time use).
How Kayin compares to similarly-sized names
Years in SSA records vs. share of all-time use concentrated in the single peak year, among 15 boys names closest to Kayin's total volume
Kayin by state
Where Kayin concentrates geographically, total births since 1977
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | California | | 7 | 1.3% |
| #2 | Illinois | | 5 | 0.9% |
7 of 548 births nationwide. Compared to a flat distribution across 2 reporting states.
Frequently Asked Questions
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What to do with Kayin's data
- Kayin's decade-level peak was the 2000s (261 total births); usage has since declined to 47 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- California records the most Kayins (7 births) -- see the full state breakdown if geography matters to your decision. California names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Kayin
Nearby Names Like Kayin
Names with a similar sound, spelling, or feel to Kayin
Compare Kayin side by side: Kayin vs Kayden Kayin vs Kayson Kayin vs Kaysen
Related Names
Names with a similar popularity rank to Kayin
Nationwide names with similar peak year or record span
Two nationwide peer axes for Kayin: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~2001)
Similar record span (~48 yrs)
Peak year is the single SSA year with the most births for that name; record span is first-to-latest year in the national files, not a recommendation or shared origin claim.
Data Sources
Data as of August 2026. Source: U.S. Social Security Administration (SSA).
According to the Social Security Administration, this profile draws directly from the agency's public-use baby-name files (updated June 2026). See our methodology for the full extraction, aggregation, and privacy-suppression rules.
Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications, National Data, 1977–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Name Almanac is rendered directly from the Social Security Administration's public baby-name files, no number is typed in by an editor. This profile for Kayin draws directly on SSA national and state-level files, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.