boy name
Declan
Gender
Boy
Popularity
#139 · U.S. boys (2025)
Popularity of Declan in the US, 1880–2025
Declan first appears in US records in 1951. It peaked in 2019, when 3,971 boys were given the name; in 2025 there were 2,570.
Source: US Social Security Administration.
Frequently asked questions
Is Declan a boy or a girl name?
Declan is most commonly used as a boy name.
How popular is the name Declan?
In 2025, Declan ranked #139 among boys’ names in the United States, according to U.S. Social Security Administration data.
When was the name Declan most popular?
Declan was most popular in 2019, when about 3,971 US babies were given the name that year, according to US Social Security Administration records.