Boy name
Declan
As of 2025, Declan ranks #139 among American boys' names, according to Social Security records. 2,570 boys received the name that year. Popularity is fading: #101 five years ago, #139 now. SSA records for Declan go back to 1951; the peak came in 2019 at #95, with 3,971 babies named that year. Geographically, it's strongest in Montana, where it ranks #66 among boy names.
Rankings
2025 rank
#139
among boy names
Trend
Falling
last 5 years
All-time peak
#95
in 2019 (2010s)
Babies in 2025
2,570
boys named Declan
Declan popularity, 1880–2025
Where Declan is most popular
Share of boys born in 2025:lowhighno data (< 5 births)
Strongest states: Wyoming (#72), Vermont (#80), Delaware (#68)
Uniqueness score
23/ 100Very common
everywhereone of a kind
A familiar pick that most people will recognize instantly. Based on how many babies per birth were named Declan in the most recent year of SSA data.