Dillan
Dillan is given to both girls and boys: 9 girls and 28 boys were given it in 2025 (#10,308 among girls’ names and #3,870 among boys’, #6,875 among all names counting both); 7,387 Americans have been recorded with it since 1975 (Social Security Administration, published May 2026).
An estimated 7,230 Americans named Dillan and born in the U.S. are alive in 2026 (98% of everyone recorded); the median is 23 years old and half are between 17 and 30.
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Dillan by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
What does Dillan mean?
Wiktionary, English section
Dillan is “a male given name.”
Variant of Dylan.
Meaning: Wiktionary, English section, as of Sep 25, 2026 (CC BY‑SA 4.0).
How popular is Dillan?
#3,870 among boys’ names, 2025
Dillan fell from #1,439 in 2015 to #3,870 in 2025 among boys’ names; its share of boys born fell from 61.6 to 16.4 per million.
341 babies in 1992, the peak
Dillan peaked in 1992, when 341 boys were given it, #553 among boys’ names. The 37 births of 2025 (girls and boys) are 11% of that peak.
Births by sex.
| Year | Births | Rank | Per 1,000 boys |
|---|---|---|---|
| 2025 | 28 | #3,870 | 0.02 |
| 2024 | 44 | #2,884 | 0.03 |
| 2023 | 42 | #2,963 | 0.02 |
| 2022 | 60 | #2,357 | 0.03 |
| 2021 | 53 | #2,507 | 0.03 |
| 2020 | 53 | #2,441 | 0.03 |
| 2019 | 50 | #2,595 | 0.03 |
| 2018 | 76 | #1,942 | 0.04 |
| 2017 | 68 | #2,054 | 0.04 |
| 2016 | 103 | #1,590 | 0.05 |
Every recorded year (47)
| Year | Births | Rank | Per 1,000 boys |
|---|---|---|---|
| 2015 | 118 | #1,439 | 0.06 |
| 2014 | 142 | #1,258 | 0.07 |
| 2013 | 129 | #1,330 | 0.07 |
| 2012 | 148 | #1,208 | 0.08 |
| 2011 | 171 | #1,088 | 0.09 |
| 2010 | 200 | #985 | 0.10 |
| 2009 | 283 | #793 | 0.14 |
| 2008 | 241 | #877 | 0.12 |
| 2007 | 254 | #839 | 0.12 |
| 2006 | 269 | #773 | 0.13 |
| 2005 | 272 | #742 | 0.14 |
| 2004 | 306 | #667 | 0.15 |
| 2003 | 297 | #668 | 0.15 |
| 2002 | 256 | #699 | 0.13 |
| 2001 | 260 | #692 | 0.13 |
| 2000 | 265 | #672 | 0.13 |
| 1999 | 300 | #608 | 0.16 |
| 1998 | 312 | #597 | 0.16 |
| 1997 | 287 | #612 | 0.15 |
| 1996 | 236 | #687 | 0.12 |
| 1995 | 270 | #625 | 0.14 |
| 1994 | 300 | #599 | 0.16 |
| 1993 | 295 | #603 | 0.15 |
| 1992 | 341 | #553 | 0.17 |
| 1991 | 222 | #677 | 0.11 |
| 1990 | 80 | #1,222 | 0.04 |
| 1989 | 49 | #1,617 | 0.02 |
| 1988 | 30 | #2,095 | 0.02 |
| 1987 | 19 | #2,747 | 0.01 |
| 1986 | 19 | #2,705 | 0.01 |
| 1985 | 6 | #5,983 | under 0.01 |
| 1984 | 9 | #4,290 | under 0.01 |
| 1983 | 6 | #5,662 | under 0.01 |
| 1982 | 10 | #4,018 | 0.01 |
| 1980 | 5 | #6,503 | under 0.01 |
| 1979 | 5 | #6,301 | under 0.01 |
| 1975 | 5 | #5,682 | under 0.01 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Dillan a boy’s or a girl’s name?
Of the 7,387 Americans recorded as Dillan, 5% are girls and 95% boys.
Years with fewer than 20 babies given the name are left blank.
Girls and boys named Dillan: the SSA national file counts each sex separately.
How many people are named Dillan, and how old are they?
7,230 alive in 2026, estimated
That is 98% of the 7,387 Americans ever recorded as Dillan. The median Dillan alive today is 23 years old; half are between 17 and 30.
The 2020 Census counted 6,657 people named Dillan (345 women and girls, 6,312 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 6,949 born in the U.S. The Census count is 4% below that prediction.
Alive today, by age
Alive today, by generation
| Generation | Born | Alive |
|---|---|---|
| Generation X | 1965-1980 | 14 |
| Millennials | 1981-1996 | 1,840 |
| Generation Z | 1997-2012 | 4,270 |
| Generation Alpha | 2013-2025 | 1,110 |
An estimate, not a count. SSA’s files count people born in the United States who received a Social Security number, so anyone born abroad is not in them; before 1937 most people got a number as adults, and their survival is counted from that age.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Where are babies named Dillan born?
| State | Births 2025 | Rank, boys | vs. national |
|---|---|---|---|
| Texas | 5 | #2,666 | 0.9× |
Where Dillan is more common than its national share predicts
Relative to its national share, Dillan is most over-represented in Louisiana: since 1975 it was given 1.7 times as often there as its national share each year would predict.
States: SSA state file, 1910-2025, published May 8, 2026; births count girls and boys together, and the rank is among boys’ names in the state in 2025. The file leaves out any state and year with fewer than 5 babies of the name, so small states are undercounted; each ratio compares the state’s births of Dillan with the births its national share predicts year by year, for states with at least 100 births of the name.
Names spelled alike
Of these 8 names spelled alike, given to 524,223 babies since 1880, Dillan is the third most given (1.4% of them). In 2025 it was given to 37 of their 7,221 babies (<1%), the fourth most given that year.
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Dillan
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Dillan and names like it
- Compare Dillan and DylanBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1990sDillan peaked in 1992.
- California’s most given namesThe state where SSA recorded the most babies named Dillan since 1910.
- The top names of 1992The year the most babies were named Dillan.
- The names of Generation ZMost people named Dillan alive today were born 1997-2012.
- Names starting with DMost given first.