Total births
513
Boys' name · since 1991
Oisin
513 babies named Oisin in U.S. Social Security records since 1991, with the highest year being 2020. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.
- #4155
- among boys today
- 513
- born since 1991
- 2010s
- peak decade
- 71%
- more common than other boys
Yes -- Oisin is the #4155 most popular boys' name in the U.S. today, with 513 recorded since 1991.
According to the U.S. Social Security Administration, Oisin has been recorded 513 times among boys since 1991, currently ranked #4155 nationally and more common than 71% 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 1991 to 2025.
- #4155 among boys today
- 513 born since 1991
- 2010s peak decade
- 71% more common than other boys
Data updated Jun 2026
The verdict
Oisin is currently the #4155 boys' name in America, more common than 71% of boys - 513 born since 1991, peaking in the 2010s.
- #4155
- among boys today
- 513
- born since 1991
- 2010s
- peak decade
- 71%
- more common than other boys
Oisin vs. every other boys name in current SSA rankings
#4155
of 14,294 boys in use
More common than 71% of names given to boys today.
2010s
Peak decade
35% of everyone ever named Oisin was born in this single decade.
2020
Single peak year
31 babies were named Oisin in 2020 - its busiest year on record.
How Oisin compares
513 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
Oisin's all-time total is 40% above the median boys name, and Liam still leads by a wide margin.
| Metric | Oisin | Median boys name (Elchonon) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 513 | 367 | 358,536 |
| Peak-year births | 31 | 23 | 22,252 |
Oisin's usage pattern, beyond the headline number
Divide Oisin's SSA record in two at 2010 and the more recent half accounts for 66% of all births, the earlier half the remaining 34%, consistent with a name still gaining ground rather than fading. Its calmest year was 1991, with only 6 births recorded -- set against the 2020 peak of 31, that's the full swing in one name's fortunes.
Oisin at a glance
Outside the top 1,000Peak year
2020
Current rank
#4,155
Active since
1991
Oisin popularity over time
Annual U.S. births registered with the Social Security Administration · 1991–2025
- Peak year (2020)
- 31
- Annual births at peak, across 35 years of records
Oisin by decade
Total births in each ten-year window, peak vs trough at a glance
2010s was Oisin's strongest decade.
181 babies received the name during that ten-year window, about 35% of all-time use.
Oisin births by decade
Total births in each ten-year window
- 1990s 43
1990s
43 births
- 2000s
2000s
132 births
- 2010s
2010s
181 births
- 2020s
2020s
157 births
What this shows Peak: 2010s at 181 births (35% of all-time use).
How Oisin 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 Oisin's total volume
Oisin vs 15 similarly-sized boys names
Oisin by state
Where Oisin concentrates geographically, total births since 1991
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | New York | | 29 | 5.7% |
| #2 | California | | 11 | 2.1% |
| #3 | Massachusetts | | 5 | 1.0% |
New York share of Oisin's total US births 5.7%
Even split
29 of 513 births nationwide. Compared to a flat distribution across 3 reporting states.
Frequently Asked Questions
How popular is the name Oisin? ▼
Since 1991, Social Security records show 513 babies named Oisin. Today it holds rank #4155 among boys. Its busiest year on record was 2020, with 31 births.
When was Oisin most popular? ▼
Oisin was most popular in the 2010s decade with 181 total births. The single peak year was 2020.
Where is Oisin most popular? ▼
The top states for the name Oisin are New York (29 births), California (11 births), Massachusetts (5 births).
How long has the name Oisin been used? ▼
The SSA has tracked Oisin since 1991 -- 35 years through the most recent 2025 data.
What to do with Oisin's data
- Oisin's usage has stayed within range of its 2010s decade-level peak (181 total births) through the 2020s (157) -- a comparatively stable name, not a fading trend.
- New York records the most Oisins (29 births) -- see the full state breakdown if geography matters to your decision. New York 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 Oisin
Related Names
Names with a similar popularity rank to Oisin
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, 1991–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Oisin: #4155 Boys' Name - 513 Births, Peak 2020." NameAlmanac. Accessed via https://namealmanac.com/name/oisin. 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 Oisin 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.