Total births
548
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.
- 548
- total births
- 1977–2025
- years on record
- 2000s
- peak decade
- 48%
- born in that decade
Kayin is not among the current top-ranked boys names; 548 have been recorded since 1977.
According to the U.S. Social Security Administration, Kayin has been recorded 548 times among boys since 1977, though it is not among the currently most-used boys names, 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.
- 548 total births
- 1977–2025 years on record
- 2000s peak decade
- 48% born in that decade
Data updated Jun 2026
The verdict
548 boys have been named Kayin since 1977, peaking in the 2000s, last recorded in 2025.
- 548
- total births
- 1977–2025
- years on record
- 2000s
- peak decade
- 48%
- born in that decade
2000s
Peak decade
48% of everyone ever named Kayin was born in this single decade.
2001
Single peak year
31 babies were named Kayin in 2001 - its busiest year on record.
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 at a glance
Last recorded 2025Peak year
2001
Current rank
Unranked
Active since
1977
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
Total births in each ten-year window, peak vs trough at a glance
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 vs 15 similarly-sized boys names
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% |
California share of Kayin's total US births 1.3%
Even split
7 of 548 births nationwide. Compared to a flat distribution across 2 reporting states.
Frequently Asked Questions
How popular is the name Kayin? ▼
Kayin has been given to 548 babies in the U.S. since 1977, according to SSA data. Its last appearance in the data was 2025. 31 babies were born in 2001, its single highest year.
When was Kayin most popular? ▼
Kayin was most popular in the 2000s decade with 261 total births. The single peak year was 2001.
Where is Kayin most popular? ▼
The top states for the name Kayin are California (7 births), Illinois (5 births).
Is Kayin a unisex name? ▼
Yes, Kayin is used for both boys and girls. As a boy's name it has 548 births, and as a girl's name it has 82 births.
How long has the name Kayin been used? ▼
Records for Kayin go back to 1977, giving 49 years of history through 2025.
What names are similar to Kayin? ▼
Names with a similar sound or spelling include Kayden, Kayson, Kaysen, Kay, and 4 more. These share a common prefix and are also used for boys.
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
- Weighing it against an alternative? Put two names side by side. Compare 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
Kayden Boy
#125 73,606 births
Kayson Boy
#291 15,201 births
Kaysen Boy
#597 6,640 births
Kay Boy
#6208 3,924 births
Kayce Boy
#419 3,316 births
Compare Kayin side by side: Kayin vs Kayden Kayin vs Kayson Kayin vs Kaysen
Related Names
Names with a similar number of total births
Data Sources
Data as of June 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).
Cite this page
NameAlmanac Editorial. "Kayin: Baby Name Since 1977 - 548 Births, Peak 2001." NameAlmanac. Accessed via https://namealmanac.com/name/kayin. Licensed CC BY-SA 4.0.
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 June 2026.