How Many People Are Named Kaydyn?
An estimated 560 people in the United States have the first name Kaydyn. It is used for both genders, with 59.6% male. The average bearer is 13 years old, and Kaydyn peaked in popularity in 2009 with 53 births that year.
Below you will find a full statistical profile of Kaydyn 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 Kaydyn paired with any surname.
Estimated Living Americans
560
About 1 in 612,061 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
59.6% confidence
Average Age
13
years old
Peak Year
2009
53 births
Total Registered
565
since 1880
Gender Distribution for Kaydyn
Kaydyn is a genuinely unisex name, used for both males (59.6%) and females (40.4%). Out of 565 total births registered, 337 were male and 228 were female.
Kaydyn as a male name
Ranked #8,636 in 2024
9 male births in 2024
Peak: 2009 (29 births)
Kaydyn as a female name
Ranked #16,761 in 2019
5 female births in 2019
Peak: 2009 (24 births)
Kaydyn: Popularity Over Time
SSA records for Kaydyn span from the 2000s to the 2020s, covering 3 decades of naming data. The most popular decade for this name was the 2010s, when 304 babies were registered. Kaydyn has declined significantly from its peak in the 2010s. Recent registrations are a fraction of what they were at the name's height.
Kaydyn by Decade
How has Kaydyn 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.
Kaydyn by State
Kaydyn + Last Name Combinations
How many people share a full name with Kaydyn as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Kaydyn
Other first names starting with K with a similar number of bearers.
Kaydyn: Questions and Answers
How many people in the U.S. are named Kaydyn?
We estimate approximately 560 people named Kaydyn 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 612,061 Americans share this first name.
Is Kaydyn a common name?
Kaydyn is classified as "Very Rare" and is more popular than 85.6% of all first names in the SSA database. A total of 565 births have been registered with this name since 1880.
When was Kaydyn most popular?
Kaydyn reached peak popularity in 2009, when 53 babies were given this name. The average age of a living person named Kaydyn is approximately 13 years old, reflecting when the name was most commonly given.
Is Kaydyn a male name?
Kaydyn is predominantly male. 59.6% of people with this name are male. See the gender breakdown above for full details.
How many Kaydyn Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Kaydyn Smith, Kaydyn Johnson, Kaydyn 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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