Total births
682
Boys' name · since 1973
Fionn
682 babies named Fionn in U.S. Social Security records since 1973, with the highest year being 2018. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.
- #4623
- among boys today
- 682
- born since 1973
- 2010s
- peak decade
- 68%
- more common than other boys
Fionn currently ranks #4623 among boys' names in America, with 682 babies recorded since 1973.
Social Security Administration records show Fionn recorded 682 times among boys since 1973, holding rank #4623 nationally today, ahead of 68% of boys, peaking in the 2010s. This profile derives year-by-year birth trends, decade totals, and state-level distribution directly from SSA birth-registration files spanning 1973 to 2025.
- #4623 among boys today
- 682 born since 1973
- 2010s peak decade
- 68% more common than other boys
Data updated Jun 2026
The verdict
Fionn is currently the #4623 boys' name in America, more common than 68% of boys - 682 born since 1973, peaking in the 2010s.
- #4623
- among boys today
- 682
- born since 1973
- 2010s
- peak decade
- 68%
- more common than other boys
Fionn vs. every other boys name in current SSA rankings
#4623
of 14,294 boys in use
More common than 68% of names given to boys today.
2010s
Peak decade
44% of everyone ever named Fionn was born in this single decade.
2018
Single peak year
40 babies were named Fionn in 2018 - its busiest year on record.
How Fionn compares
682 Top 37% higher than 63% 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
Fionn's all-time total is 86% above the median boys name, and Liam still leads by a wide margin.
| Metric | Fionn | Median boys name (Elchonon) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 682 | 367 | 358,536 |
| Peak-year births | 40 | 23 | 22,252 |
Fionn's usage pattern, beyond the headline number
Divide Fionn's SSA record in two at 2011 and the more recent half accounts for 65% of all births, the earlier half the remaining 35%, consistent with a name still gaining ground rather than fading. Its calmest year was 1973, with only 5 births recorded -- set against the 2018 peak of 40, that's the full swing in one name's fortunes.
Fionn at a glance
Outside the top 1,000Peak year
2018
Current rank
#4,623
Active since
1973
Fionn popularity over time
Annual U.S. births registered with the Social Security Administration · 1973–2025
- Peak year (2018)
- 40
- Annual births at peak, across 53 years of records
Fionn by decade
Total births in each ten-year window, peak vs trough at a glance
2010s was Fionn's strongest decade.
297 babies received the name during that ten-year window, about 44% of all-time use.
Fionn births by decade
Total births in each ten-year window
- 1970s 5
1970s
5 births
- 1990s 19
1990s
19 births
- 2000s
2000s
192 births
- 2010s
2010s
297 births
- 2020s
2020s
169 births
What this shows Peak: 2010s at 297 births (44% of all-time use).
How Fionn 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 Fionn's total volume
Fionn vs 15 similarly-sized boys names
Fionn by state
Where Fionn concentrates geographically, total births since 1973
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | California | | 52 | 7.6% |
| #2 | New York | | 51 | 7.5% |
| #3 | Massachusetts | | 16 | 2.3% |
| #4 | Pennsylvania | | 5 | 0.7% |
California share of Fionn's total US births 7.6%
Even split
52 of 682 births nationwide. Compared to a flat distribution across 4 reporting states.
Frequently Asked Questions
How popular is the name Fionn? ▼
Fionn has been given to 682 babies in the U.S. since 1973, according to SSA data. Among boys, it ranks #4623 as of the latest data. 40 babies were born in 2018, its single highest year.
When was Fionn most popular? ▼
Fionn was most popular in the 2010s decade with 297 total births. The single peak year was 2018.
Where is Fionn most popular? ▼
The top states for the name Fionn are California (52 births), New York (51 births), Massachusetts (16 births).
How long has the name Fionn been used? ▼
The SSA has tracked Fionn since 1973 -- 53 years through the most recent 2025 data.
What names are similar to Fionn? ▼
Names with a similar sound or spelling include Fiore, Fiori, Fionnlagh, Fiorenzo, and 1 more. These share a common prefix and are also used for boys.
What to do with Fionn's data
- Fionn's usage has stayed within range of its 2010s decade-level peak (297 total births) through the 2020s (169) -- a comparatively stable name, not a fading trend.
- California records the most Fionns (52 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 Fionn
Nearby Names Like Fionn
Names with a similar sound, spelling, or feel to Fionn
Fiore Boy
465 births
Fiori Boy
6 births
Fionnlagh Boy
6 births
Fiorenzo Boy
6 births
Fiona Boy
5 births
Compare Fionn side by side: Fionn vs Fiore Fionn vs Fiori Fionn vs Fionnlagh
Related Names
Names with a similar popularity rank to Fionn
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, 1973–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Fionn: #4623 Boys' Name - 682 Births, Peak 2018." NameAlmanac. Accessed via https://namealmanac.com/name/fionn. 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 Fionn 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.