Dillan
- US rank
- #10,107
- Syllables
- 2
- Peak
- #4,307 in 2003
9 babies were named Dillan in the US in 2025. It has dropped 1,701 places in five years.
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US births per million girls, 1993–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Dillan you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- How commonAbout 1 in every 178,571 baby girls born in the US in 2025 was named Dillan, 9 babies in all. In a typical school of 500 kids, your Dillan would very likely be the only one.
- HistoryDillan first shows up in US birth records in 1975, the first year at least 5 babies got it. It has been in use for 50 years since.
- Best yearIts best year was 2003, when it reached #4,307.
- TrendDillan has slipped 1,701 places over the last five years and now sits at #10,107. Good news if you want a familiar name that fewer kids will share.
- Boy or girlDillan is given to both boys and girls: 76% of the 37 babies named Dillan in 2025 were boys. That makes it one of the names that truly works for either.
About the name Dillan
Dillan is a girl name of Irish origin. It has 6 letters and 2 syllables, starting with D and ending in “-lan”. US birth records list Dillan for girls from 1993 to 2025, in 30 of those 33 years. Its best year was 2003, when it ranked #4,307 among girl names. In 2025 it ranked #10,107, with 9 babies.
Origin:Irish names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1990s | 2.5 | 402,299 girls |
| 2000s | 8.4 | 119,048 girls |
| 2010s | 7.9 | 125,945 girls |
| 2020s | 6.9 | 145,278 girls |
Other spellings of Dillan
More Irish girl names
- Girl name: Abigail · my father is joy
- Unisex name: Riley · rye clearing
- Girl name: Maeve · she who intoxicates
- Unisex name: Kennedy · helmeted head
- Unisex name: Rylee · rye clearing
- Unisex name: Sloane · raider
- Unisex name: Alani · orange tree
- Girl name: Everleigh · boar clearing
Questions about the name Dillan
What is the origin of the name Dillan?
Dillan has Irish roots in our records. Other Irish names include Abigail, Riley, Maeve.
Is Dillan a boy or girl name?
Dillan is a girl name, though a few boys get it too.
How popular is the name Dillan?
Dillan ranked #10,107 for US girls in 2025, given to 9 babies. Its best year was 2003 (#4,307).