Baby Names US
Unisex name ★ peaked 1992

Dillan

Meaning Spelling variant of Dylan Gender Unisex · 5% girls Rank 2025 #3,871 Trend ↓ Falling 34%

Spelling variant of Dylan.

Rank 2025
#3,871
among boys · ↓987 vs 2024
Babies in 2025
37
named Dillan · -31% vs 2024
How common
1 in 61,003
boys born in 2025
Peak year
1992
341 babies
All-time total
7,387
#1,461 all-time among boys
First recorded
1975
in Social Security records

Dillan popularity over time

7,387 babies have been named Dillan since 1975, 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
0.050.10.150.218801900192019401960198020002020BoysGirls
BoysGirls

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 Girls Boys Total Per year Change Best rank
1880s – – – – – –
1890s – – – – – –
1900s – – – – – –
1910s – – – – – –
1920s – – – – – –
1930s – – – – – –
1940s – – – – – –
1950s – – – – – –
1960s – – – – – –
1970s – 10 10 1 – #5,684
1980s – 153 153 15 +1430% #1,622
1990s 31 2,643 2,674 267 +1648% #553
2000s 156 2,703 2,859 286 +7% #667
2010s 139 1,205 1,344 134 -53% #985
2020s (to 2025) 67 280 347 58 -57% #2,358

Where Dillan 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 26 0.02 outside top 500
2027 24 0.01 outside top 500
2028 23 0.01 outside top 500
2029 22 0.01 outside top 500
2030 21 0.01 outside top 500

The story of Dillan

Dillan is rare for boys in the United States, ranked #3,871 in 2025 with 28 babies given the name. It is currently declining compared with a decade ago.

Since 1975, 7,387 American babies have been named Dillan, about 95% boys and 5% girls, making it a genuinely unisex name. Its peak came in 1992, when 341 newborns received the name, the signature sound of the 1990s.

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 Dillan stood among all boys' names in any year, or use the compare tool to plot it against other names.

How old are people named Dillan?

The median living Dillan is about 22 years old; half are between 16 and 29. An estimated 7,300 people named Dillan are alive in the United States today.

median 22 020406080100

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

Dillan year by year

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

Year Girls Girls rank Boys Boys rank
2025 9 #10,312 28 #3,871
2024 10 #9,735 44 #2,884
2023 12 #8,617 42 #2,964
2022 11 #9,216 60 #2,358
2021 13 #8,153 53 #2,508
2020 12 #8,536 53 #2,442
2019 8 #11,640 50 #2,596
2018 14 #7,878 76 #1,943
2017 17 #6,886 68 #2,054
2016 9 #11,105 103 #1,590
2015 8 #12,143 118 #1,439
2014 13 #8,601 142 #1,258
2013 11 #9,774 129 #1,330
2012 16 #7,555 148 #1,208
2011 19 #6,645 171 #1,088
2010 24 #5,665 200 #985
2009 21 #6,377 283 #793
2008 29 #5,050 241 #877
2007 12 #9,709 254 #839
2006 9 #11,700 269 #773
2005 25 #5,146 272 #742
2004 18 #6,565 306 #667
2003 30 #4,337 297 #668
2002 7 #12,571 256 #699
2001 5 #16,021 260 #693
2000 – – 265 #673
1995 5 #14,061 270 #626
1990 – – 80 #1,227
1985 – – 6 #5,988
1980 – – 5 #6,505
1975 – – 5 #5,684
1970 – – – –
1965 – – – –
1960 – – – –
1955 – – – –
1950 – – – –
1945 – – – –
1940 – – – –
1935 – – – –
1930 – – – –
1925 – – – –
1920 – – – –
1915 – – – –
1910 – – – –
1905 – – – –
1900 – – – –
1895 – – – –
1890 – – – –
1885 – – – –
1880 – – – –

Frequently asked questions

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

How old is the average Dillan?

The median living Dillan is about 22 years old. Half of all living Dillans are between 16 and 29 years old.

How many people named Dillan are alive today?

An estimated 7,300 people named Dillan are alive in the United States, based on 7,387 recorded births and Social Security life tables.

What does the name Dillan mean?

Spelling variant of Dylan.

How popular is the name Dillan in 2025?

Dillan ranked #3,871 among boys' names in the United States in 2025, with 28 babies given the name, according to Social Security Administration data.

How many people are named Dillan?

7,387 babies have been named Dillan in the United States since 1975, based on Social Security card applications.

When was the name Dillan most popular?

Dillan peaked in 1992, when 341 newborns received the name.

Is Dillan a boy or girl name?

Dillan is used for both: about 5% of babies named Dillan have been girls and 95% boys.

Is the name Dillan rising or falling?

Dillan is declining, less popular now than a decade ago.

Will Dillan become more popular?

Dillan is trending downward. If the recent trend holds, we project roughly 21 boys named Dillan in 2030, which would rank outside the top 500. Forecasts assume the current trend continues and become less certain further out.

Names like Dillan

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

Compare Dillan with similar names → More names starting with D →