Baby Names US
boys' name ★ peaked 2018

Fionn

Gender Boy Rank 2025 #4,171 Trend → Stable
Rank 2025
#4,171
among boys · ↑434 vs 2024
Babies in 2025
25
named Fionn · +14% vs 2024
How common
1 in 68,323
boys born in 2025
Peak year
2018
40 babies
All-time total
682
#6,555 all-time among boys
First recorded
1973
in Social Security records

Fionn popularity over time

682 babies have been named Fionn since 1973, according to official Social Security records. Switch measure to see births per year or the yearly rank.

Measure
Births per 1,000 babies of that sex, comparable across eras
0.010.010.020.0318801900192019401960198020002020Peak 2021Boys

By decade. Change compares yearly averages, so the current partial decade is on equal footing. Best rank is the name's best yearly rank within the decade.

Decade Boys Per year Change Best rank
1880s – – – –
1890s – – – –
1900s – – – –
1910s – – – –
1920s – – – –
1930s – – – –
1940s – – – –
1950s – – – –
1960s – – – –
1970s 5 1 – #5,351
1980s – – – –
1990s 19 2 – #6,819
2000s 192 19 +911% #3,663
2010s 297 30 +55% #2,964
2020s (to 2025) 169 28 -5% #3,038

Where Fionn is heading

A five-year projection from the recent trend in births per 1,000 boys (damped so it flattens over time), converted to babies at today's birth totals. The implied rank places that projection in the 2025 field. A projection, not a promise: real trends bend.

Year Projected babies Per 1,000 boys Implied rank
2026 24 0.01 outside top 500
2027 24 0.01 outside top 500
2028 23 0.01 outside top 500
2029 23 0.01 outside top 500
2030 23 0.01 outside top 500

The story of Fionn

Fionn is rare for boys in the United States, ranked #4,171 in 2025 with 25 babies given the name. It is currently holding steady compared with a decade ago.

Since 1973, 682 American babies have been named Fionn. Its peak came in 2018, when 40 newborns received the name, the signature sound of the 2010s.

The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Fionn stood among all boys' names in any year, or use the compare tool to plot it against other names.

How old are people named Fionn?

The median living Fionn is about 11 years old; half are between 6 and 17. An estimated 700 people named Fionn are alive in the United States today.

median 11 020406080100

Estimated from births per year and Social Security period life tables; an approximation of the living age distribution, by age in years.

Fionn year by year

Every year since 2001, and five-year steps back to 1880. Rank is within each sex.

Year Boys Boys rank
2025 25 #4,171
2024 22 #4,605
2023 31 #3,650
2022 28 #3,922
2021 40 #3,038
2020 23 #4,315
2019 25 #4,152
2018 40 #2,964
2017 33 #3,405
2016 29 #3,715
2015 31 #3,542
2014 24 #4,172
2013 28 #3,690
2012 37 #3,073
2011 25 #4,022
2010 25 #4,031
2009 29 #3,663
2008 29 #3,677
2007 20 #4,692
2006 18 #4,928
2005 25 #3,751
2004 16 #5,086
2003 15 #5,119
2002 11 #6,223
2001 13 #5,472
2000 16 #4,651
1995 – –
1990 – –
1985 – –
1980 – –
1975 – –
1970 – –
1965 – –
1960 – –
1955 – –
1950 – –
1945 – –
1940 – –
1935 – –
1930 – –
1925 – –
1920 – –
1915 – –
1910 – –
1905 – –
1900 – –
1895 – –
1890 – –
1885 – –
1880 – –

Famous people named Fionn

The most globally famous bearers of the name, ranked by fame across Wikipedia editions (Pantheon project, MIT).

  1. 1 Fionn Whitehead Fionn Whitehead English actor (born 1997) Contemporary

Portraits from Wikipedia (Wikimedia Commons).

Frequently asked questions

Quick answers about Fionn, drawn from the same Social Security data as the charts above.

How old is the average Fionn?

The median living Fionn is about 11 years old. Half of all living Fionns are between 6 and 17 years old.

How many people named Fionn are alive today?

An estimated 700 people named Fionn are alive in the United States, based on 682 recorded births and Social Security life tables.

How popular is the name Fionn in 2025?

Fionn ranked #4,171 among boys' names in the United States in 2025, with 25 babies given the name, according to Social Security Administration data.

How many people are named Fionn?

682 babies have been named Fionn in the United States since 1973, based on Social Security card applications.

When was the name Fionn most popular?

Fionn peaked in 2018, when 40 newborns received the name.

Is Fionn a boy or girl name?

Fionn is overwhelmingly a boy's name: 100% of babies with the name.

Is the name Fionn rising or falling?

Fionn has been roughly stable over the past decade.

Will Fionn become more popular?

Fionn is trending downward. If the recent trend holds, we project roughly 23 boys named Fionn in 2030, which would rank outside the top 500. Forecasts assume the current trend continues and become less certain further out.

Who are famous people named Fionn?

Well-known people named Fionn include Fionn Whitehead (actor).

Names like Fionn

Names that sound and feel close to Fionn: shared sounds, similar era, similar popularity. Each links to its full history.

Compare Fionn with similar names → More names starting with F →