How Many People Are Named Kaithlin?
An estimated 5 people in the United States have the first name Kaithlin. It is almost exclusively a female name. The average bearer is 36 years old, and Kaithlin peaked in popularity in 1988 with 5 births that year.
Below you will find a full statistical profile of Kaithlin 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 Kaithlin paired with any surname.
Key Insights
- Kaithlin is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
5
About 1 in 68,550,868 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
36
years old
Peak Year
1988
5 births
Total Registered
5
since 1880
Gender Distribution for Kaithlin
Kaithlin is almost exclusively a female name. Out of 5 total births registered, 100.0% were female.
Kaithlin as a female name
Ranked #12,692 in 1988
5 female births in 1988
Peak: 1988 (5 births)
Kaithlin: Popularity Over Time
Kaithlin by Decade
How has Kaithlin 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.
| Decade | Total | Male | Female | |
|---|---|---|---|---|
| 1980s | 5 | 0 | 5 | |
Kaithlin + Last Name Combinations
How many people share a full name with Kaithlin as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Kaithlin
Other first names starting with K with a similar number of bearers.
Kaithlin: Questions and Answers
How many people in the U.S. are named Kaithlin?
We estimate approximately 5 people named Kaithlin 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 68,550,868 Americans share this first name.
Is Kaithlin a common name?
Kaithlin is classified as "Very Rare" and is more popular than 18.2% of all first names in the SSA database. A total of 5 births have been registered with this name since 1880.
When was Kaithlin most popular?
Kaithlin reached peak popularity in 1988, when 5 babies were given this name. The average age of a living person named Kaithlin is approximately 36 years old, reflecting when the name was most commonly given.
Is Kaithlin a female name?
Kaithlin is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Kaithlin Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Kaithlin Smith, Kaithlin Johnson, Kaithlin 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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