How old is someone named Declan?
The average Declan is 10 years old.
Half of all living Declans are between 5 and 14.
When was Declan popular?
Declan has been rising for years and peaked in 2019, so most Declans are still kids.
Popular names of 2019 · The most popular names of the 2010s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1950s | 27 | under 100 |
| 1960s | 70 | under 100 |
| 1970s | 53 | under 100 |
| 1980s | 145 | 140 |
| 1990s | 1,135 | 1,100 |
| 2000s | 7,280 | 7,200 |
| 2010s | 31,336 | 31,000 |
| 2020s | 18,904 | 19,000 |
How many Declans are still alive?
About 58,000 Declans are alive in the US today. That's over 99% of the roughly 59,000 babies named Declan since 1951.
Nearly every Declan ever born is still alive, because almost all of them are young.
What generation is the name Declan?
Three in four living Declans are in Gen Alpha, born in 2013 or later.
- Millennial under 1%
- Gen Z 24%
- Gen Alpha 75%
Is Declan an old name?
No. Declan is one of the youngest names around: younger than 94 in 100 names on AgeByName.
Looking ahead: if babies keep getting the name at today's pace, the typical Declan will be 26 in 2056, so the name is getting older.
Is Declan a boy or girl name?
Almost entirely boys: 99.3% of living Declans are men.
Names the same age as Declan
NAME TWIN
Declan's name twin is Jayce. Of all 3,713 names on AgeByName, Jayce's age curve is the closest match to Declan's: 95% alike.
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Questions about the name Declan
How old is the average Declan?
The average Declan in the US is 10 years old. The median is 9, so half are older and half younger.
How many people are named Declan?
About 58,000 Declans are alive in the US today, out of roughly 59,000 babies given the name since 1951.
When was the name Declan most popular?
In 2019, when about 4,000 baby boys were named Declan.
Is Declan a Gen Alpha name?
Yes. About 75% of living Declans are in Gen Alpha, born in 2013 or later.
Estimates from Social Security Administration baby-name records (births 1880–2025) and SSA cohort life tables (2026 Trustees Report). Updated each spring. How we calculate this