How Many People Are Named Declyn?
An estimated 724 people in the United States have the first name Declyn. It is used for both genders, with 60.2% male. The average bearer is 9 years old, and Declyn peaked in popularity in 2018 with 70 births that year.
Below you will find a full statistical profile of Declyn as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Declyn paired with any surname.
Estimated Living Americans
724
About 1 in 473,418 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
60.2% confidence
Average Age
9
years old
Peak Year
2018
70 births
Total Registered
729
since 1880
Gender Distribution for Declyn
Declyn is a genuinely unisex name, used for both males (60.2%) and females (39.8%). Out of 729 total births registered, 439 were male and 290 were female.
Declyn as a male name
Ranked #5,087 in 2024
19 male births in 2024
Peak: 2016 (41 births)
Declyn as a female name
Ranked #5,977 in 2024
20 female births in 2024
Peak: 2018 (30 births)
Declyn: Popularity Over Time
SSA records for Declyn span from the 2000s to the 2020s, covering 3 decades of naming data. The most popular decade for this name was the 2010s, when 444 babies were registered. While Declyn is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Declyn by Decade
How has Declyn tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Declyn + Last Name Combinations
How many people share a full name with Declyn as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Declyn
Other first names starting with D with a similar number of bearers.
Declyn: Questions and Answers
How many people in the U.S. are named Declyn?
We estimate approximately 724 people named Declyn are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 473,418 Americans share this first name.
Is Declyn a common name?
Declyn is classified as "Very Rare" and is more popular than 87.8% of all first names in the SSA database. A total of 729 births have been registered with this name since 1880.
When was Declyn most popular?
Declyn reached peak popularity in 2018, when 70 babies were given this name. The average age of a living person named Declyn is approximately 9 years old, reflecting when the name was most commonly given.
Is Declyn a male name?
Declyn is predominantly male. 60.2% of people with this name are male. See the gender breakdown above for full details.
How many Declyn Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Declyn Smith, Declyn Johnson, Declyn Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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