Dillan
Boy name · #3880 in 2025 · Very rare
How old is the name Dillan? In official American birth records, Dillan has been tracked continuously since 1975, giving it 50 years of documented American history.
Dillan ranks #3880 among American boys' names as of 2025, with 28 newborns given the name that year. A decade ago it stood at #1438, so the name has been falling over the past ten years. Roughly one in every 64,286 boys born in 2025 was named Dillan.
Babies named Dillan per year. Source: Official national birth records.
The 50-year story
Dillan first appears in the Social Security records in 1975, when 5 boys received the name. Its peak came in 1992, when 341 boys were named Dillan — good for #553 that year. Today's parents encounter it on its way down the popularity curve, which for many parents is exactly the appeal. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Unlock the 5-year forecast and compare Dillan against up to 5 other names.
Uniqueness: will there be another Dillan in class?
On our rarity read — which blends how common Dillan is today with its five-year momentum — the name reads as "very rare". A high score means genuine rarity — your Dillan will likely be the only one in the room, with the occasional spelling-out as the price.
Where Dillan is most common
State-level data for Dillan is too sparse in 2025 to rank by rate — in most states its count falls below the SSA's per-state reporting threshold (counts under 5 are withheld).
Names like Dillan
Statistically, parents drawn to Dillan tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Kalan, Daquan, Caelan, Quinlan, and Daylan.
KalanDaquanCaelanQuinlanDaylanDevanDarionJaylan
Rank history (last 25 years)
| Year | Babies named Dillan | Rank |
|---|---|---|
| 2025 | 28 | #3848 |
| 2024 | 44 | #2873 |
| 2023 | 42 | #2952 |
| 2022 | 60 | #2355 |
| 2021 | 53 | #2499 |
| 2020 | 53 | #2437 |
| 2019 | 50 | #2582 |
| 2018 | 76 | #1937 |
| 2017 | 68 | #2049 |
| 2016 | 103 | #1585 |
| 2015 | 118 | #1438 |
| 2014 | 142 | #1257 |
| 2013 | 129 | #1326 |
| 2012 | 148 | #1207 |
| 2011 | 171 | #1088 |
| 2010 | 200 | #984 |
| 2009 | 283 | #793 |
| 2008 | 241 | #877 |
| 2007 | 254 | #839 |
| 2006 | 269 | #773 |
| 2005 | 272 | #742 |
| 2004 | 306 | #666 |
| 2003 | 297 | #668 |
| 2002 | 256 | #699 |
| 2001 | 260 | #692 |
Frequently asked questions
How old is the name Dillan?
In official American birth records, the name Dillan first appeared in 1975 (over 50 years ago), when 5 newborn boys received the name. It has been tracked in modern national records for 50 years.
Is Dillan a popular boy name?
Dillan ranked #3880 among boys in 2025 with 28 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #1438.
When was the name Dillan most popular?
Dillan peaked in 1992, when 341 American boys received the name (ranked #553 that year). Since 1992 the name has declined from that high.
How rare is the name Dillan?
In 2025, roughly 1 in 64,286 newborn American boys was named Dillan. On our rarity scale (rarity blended with momentum) we classify it as "very rare".
Data source: Official American birth records, 1880–2025, national and state files. Counts reflect registered birth records for American families.