How Many People Are Named Kaileen?
An estimated 818 people in the United States have the first name Kaileen. It is almost exclusively a female name. The average bearer is 19 years old, and Kaileen peaked in popularity in 2022 with 83 births that year.
Below you will find a full statistical profile of Kaileen 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 Kaileen paired with any surname.
Estimated Living Americans
818
About 1 in 419,015 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
19
years old
Peak Year
2022
83 births
Total Registered
834
since 1880
Gender Distribution for Kaileen
Kaileen is almost exclusively a female name. Out of 834 total births registered, 100.0% were female.
Kaileen as a female name
Ranked #5,066 in 2024
26 female births in 2024
Peak: 2022 (83 births)
Kaileen: Popularity Over Time
SSA records for Kaileen span from the 1970s to the 2020s, covering 6 decades of naming data. The most popular decade for this name was the 2020s, when 217 babies were registered. Kaileen remains highly popular today, with recent registration numbers near its historical peak.
Kaileen by Decade
How has Kaileen 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.
Kaileen by State
Birth registrations for Kaileen span all 5 states and territories in the SSA database. The highest counts are in California, Texas, Florida. The lowest are in New York, Arizona, Florida. On average, about 32 Kaileens were registered per state.
Kaileen + Last Name Combinations
How many people share a full name with Kaileen as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Kaileen
Other first names starting with K with a similar number of bearers.
Kaileen: Questions and Answers
How many people in the U.S. are named Kaileen?
We estimate approximately 818 people named Kaileen 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 419,015 Americans share this first name.
Is Kaileen a common name?
Kaileen is classified as "Very Rare" and is more popular than 88.7% of all first names in the SSA database. A total of 834 births have been registered with this name since 1880.
When was Kaileen most popular?
Kaileen reached peak popularity in 2022, when 83 babies were given this name. The average age of a living person named Kaileen is approximately 19 years old, reflecting when the name was most commonly given.
Is Kaileen a female name?
Kaileen is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Kaileen Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Kaileen Smith, Kaileen Johnson, Kaileen 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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