How Many People Are Named Kailyn?
An estimated 14,013 people in the United States have the first name Kailyn. It is predominantly female (99.1%). The average bearer is 19 years old, and Kailyn peaked in popularity in 2011 with 799 births that year.
Below you will find a full statistical profile of Kailyn 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 Kailyn paired with any surname.
Key Insights
- While Kailyn is overwhelmingly female, 132 male births have been registered with this name since 1880.
Estimated Living Americans
14,013
About 1 in 24,460 people in the U.S.
Rarity
Uncommon
Predicted Gender
Female
99.1% confidence
Average Age
19
years old
Peak Year
2011
799 births
Total Registered
14,230
since 1880
Gender Distribution for Kailyn
Kailyn is almost exclusively a female name. Out of 14,230 total births registered, 99.1% were female.
Kailyn as a male name
Ranked #5,758 in 2024
16 male births in 2024
Peak: 2024 (16 births)
Kailyn as a female name
Ranked #1,578 in 2024
133 female births in 2024
Peak: 2011 (793 births)
Kailyn: Popularity Over Time
SSA records for Kailyn span from the 1980s to the 2020s, covering 5 decades of naming data. The most popular decade for this name was the 2000s, when 5,609 babies were registered. Kailyn has declined significantly from its peak in the 2000s. Recent registrations are a fraction of what they were at the name's height.
Kailyn by Decade
How has Kailyn 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.
Kailyn by State
Birth registrations for Kailyn span all 46 states and territories in the SSA database. The highest counts are in California, Texas, Florida. The lowest are in Rhode Island, Montana, Alaska. On average, about 269 Kailyns were registered per state.
Kailyn + Last Name Combinations
How many people share a full name with Kailyn as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Kailyn
Other first names starting with K with a similar number of bearers.
Kailyn: Questions and Answers
How many people in the U.S. are named Kailyn?
We estimate approximately 14,013 people named Kailyn 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 24,460 Americans share this first name.
Is Kailyn a common name?
Kailyn is classified as "Uncommon" and is more popular than 98.1% of all first names in the SSA database. A total of 14,230 births have been registered with this name since 1880.
When was Kailyn most popular?
Kailyn reached peak popularity in 2011, when 799 babies were given this name. The average age of a living person named Kailyn is approximately 19 years old, reflecting when the name was most commonly given.
Is Kailyn a female name?
Kailyn is predominantly female. 99.1% of people with this name are female. See the gender breakdown above for full details.
How many Kailyn Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Kailyn Smith, Kailyn Johnson, Kailyn 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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