Total births
510
Unisex name · since 2000
Casyn
510 babies named Casyn in U.S. Social Security records since 2000, with the highest year being 2020. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.
- #4668
- among boys today
- 510
- born since 2000
- 2010s
- peak decade
- 67%
- more common than other boys
510 babies have been named Casyn since 2000, making it today's #4668 unisex name.
According to the U.S. Social Security Administration, Casyn has been recorded 510 times among boys since 2000, currently ranked #4668 nationally and more common than 67% of boys, with its heaviest use in the 2010s. This profile covers year-by-year birth trends, decade totals, and state-level distribution, all derived directly from SSA birth-registration files spanning 2000 to 2025.
- #4668 among boys today
- 510 born since 2000
- 2010s peak decade
- 67% more common than other boys
Data updated Jul 2026
The verdict
Casyn is currently the #4668 unisex name in America, more common than 67% of boys - 510 born since 2000, peaking in the 2010s.
- #4668
- among boys today
- 510
- born since 2000
- 2010s
- peak decade
- 67%
- more common than other boys
Casyn vs. every other boys name in current SSA rankings
#4668
of 14,294 boys in use
More common than 67% of names given to boys today.
2010s
Peak decade
53% of everyone ever named Casyn was born in this single decade.
2020
Single peak year
35 babies were named Casyn in 2020 - its busiest year on record.
How Casyn compares
510 Top 43% higher than 57% of 14,294 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
Casyn's all-time total is 39% above the median boys name, and Liam still leads by a wide margin.
| Metric | Casyn | Median boys name (Elchonon) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 510 | 367 | 358,536 |
| Peak-year births | 35 | 23 | 22,252 |
Casyn's usage pattern, beyond the headline number
Casyn splits its recorded history at 2015: 59% of all births land in the more recent half, 41% in the earlier half, an evenly balanced pattern over time. The single quietest year was 2000 (5 births) -- compare that against the 2020 peak of 35 for a sense of just how much the name's popularity has swung.
Casyn at a glance
Outside the top 1,000Peak year
2020
Current rank
#4,668
Active since
2000
Casyn popularity over time - boys
Annual U.S. births registered with the Social Security Administration · 2000–2025
- Peak year (2020)
- 35
- Annual births at peak, across 26 years of records
Casyn popularity over time - girls
26 total births recorded since 2012 (Casyn as girls' name)
Casyn by decade
Total births in each ten-year window, peak vs trough at a glance
2010s was Casyn's strongest decade.
271 babies received the name during that ten-year window, about 53% of all-time use.
Casyn births by decade
Total births in each ten-year window
- 2000s 80
2000s
80 births
- 2010s
2010s
271 births
- 2020s
2020s
159 births
What this shows Peak: 2010s at 271 births (53% of all-time use).
How Casyn 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 Casyn's total volume
Casyn vs 15 similarly-sized boys names
Casyn by state
Where Casyn concentrates geographically, total births since 2000
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Texas | | 40 | 7.8% |
Texas share of Casyn's total US births 7.8%
40 of 510 births nationwide.
Frequently Asked Questions
How popular is the name Casyn? ▼
510 babies have been named Casyn since 2000. It currently ranks #4668 among boys. The peak year was 2020 with 35 births.
When was Casyn most popular? ▼
Casyn was most popular in the 2010s decade with 271 total births. The single peak year was 2020.
Where is Casyn most popular? ▼
The top states for the name Casyn are Texas (40 births).
Is Casyn a unisex name? ▼
Yes, Casyn is used for both boys and girls. As a boy's name it has 510 births, and as a girl's name it has 26 births.
How long has the name Casyn been used? ▼
The SSA has tracked Casyn since 2000 -- 26 years through the most recent 2025 data.
What names are similar to Casyn? ▼
Names with a similar sound or spelling include Casey, Cash, Cason, Case, and 4 more. These share a common prefix and are also used for boys.
What to do with Casyn's data
- Casyn's usage has stayed within range of its 2010s decade-level peak (271 total births) through the 2020s (159) -- a comparatively stable name, not a fading trend.
- Texas records the most Casyns (40 births) -- see the full state breakdown if geography matters to your decision. Texas 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 Casyn
Nearby Names Like Casyn
Names with a similar sound, spelling, or feel to Casyn
Casey Boy
#311 116,675 births
Cash Boy
#316 27,705 births
Cason Boy
#856 11,308 births
Case Boy
#724 9,926 births
Cassius Boy
#569 9,736 births
Compare Casyn side by side: Casyn vs Casey Casyn vs Cash Casyn vs Cason
Related Names
Names with a similar popularity rank to Casyn
Data Sources
Data as of July 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, 2000–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Casyn: #4668 Unisex Name - 510 Births, Peak 2020." NameAlmanac. Accessed via https://namealmanac.com/name/casyn. 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 Casyn 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 July 2026.