How Many People Are Named Kailey?
An estimated 26,603 people in the United States have the first name Kailey. It is almost exclusively a female name. The average bearer is 22 years old, and Kailey peaked in popularity in 2004 with 1,449 births that year.
Below you will find a full statistical profile of Kailey 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 Kailey paired with any surname.
Estimated Living Americans
26,603
About 1 in 12,884 people in the U.S.
Rarity
Uncommon
Predicted Gender
Female
100.0% confidence
Average Age
22
years old
Peak Year
2004
1,449 births
Total Registered
27,099
since 1880
Gender Distribution for Kailey
Kailey is almost exclusively a female name. Out of 27,099 total births registered, 100.0% were female.
Kailey as a male name
Ranked #7,264 in 2004
10 male births in 2004
Peak: 2004 (10 births)
Kailey as a female name
Ranked #1,284 in 2024
180 female births in 2024
Peak: 2004 (1,439 births)
Kailey: Popularity Over Time
SSA records for Kailey span from the 1970s to the 2020s, covering 6 decades of naming data. The most popular decade for this name was the 2000s, when 11,846 babies were registered. Kailey has declined significantly from its peak in the 2000s. Recent registrations are a fraction of what they were at the name's height.
Kailey by Decade
How has Kailey 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.
Kailey by State
Birth registrations for Kailey span all 49 states and territories in the SSA database. The highest counts are in California, Texas, Florida. The lowest are in Wyoming, Delaware, North Dakota. On average, about 522 Kaileys were registered per state.
Kailey + Last Name Combinations
How many people share a full name with Kailey as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Kailey
Other first names starting with K with a similar number of bearers.
Kailey: Questions and Answers
How many people in the U.S. are named Kailey?
We estimate approximately 26,603 people named Kailey 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 12,884 Americans share this first name.
Is Kailey a common name?
Kailey is classified as "Uncommon" and is more popular than 98.7% of all first names in the SSA database. A total of 27,099 births have been registered with this name since 1880.
When was Kailey most popular?
Kailey reached peak popularity in 2004, when 1,449 babies were given this name. The average age of a living person named Kailey is approximately 22 years old, reflecting when the name was most commonly given.
Is Kailey a female name?
Kailey is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Kailey Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Kailey Smith, Kailey Johnson, Kailey 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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