Kailen
#4,464 in 2025UnisexBoys' nameGirls' nameMeaning not yet documented
Kailen has been given to 1,673 babies in the U.S. since 1983. In 2025 it ranked #4,464 of 13,926 boys’ names in use. Its peak year was 2023, with 43 recorded. It's used for both sexes: 56% boys, 44% girls all-time.
Babies named Kailen, 2025
1 in 144,000
Kailen over time, 1880–2025
Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.
Girls or boys — Kailen over time
In 2025, Kailen went to 0% girls and 100% boys.
A sex is only published in years it reached five applications, so a stretch at 0% or 100% means the other side stayed under that floor — not that it was never used.
How common is Kailen?
Everything below is computed from the 2025 data — the most recent year available.
- Among all babies, 2025
- 1 in 144,000
- 23 of 3,315,165 births
- Among boys only
- 1 in 74,300
- <0.01% of boys
- Rank, 2025
- #4,464
- of 13,926 boys’ names in use
- Coin-flip room size
- 99,910 kids
- Even odds of a second one
Where Kailen sits on the popularity scale
Chance at least one other child shares the name
If the other children were drawn at random from the 2025 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.
Put another way: gather 99,910 children born in 2025 and it's an even bet that one of them is another Kailen. In a class of 30 the chance is Under 1%.
When Kailens were born
Half of everyone ever recorded as Kailen was born before 2010 — so the typical Kailen is around 15 today.
- Biggest decade
- 2010s
- 31.2% of all use
- Born in the last 25 years
- 81.5%
- A modern name
- Recorded since 1950
- 945
- People you could plausibly meet
2010s — 31.2% of all recorded uses (295).
Is Kailen rising or falling?
Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.
- Rank vs 1 year ago
- −1,273
- Places dropped
- Rank vs 5 years ago
- −1,298
- Places dropped
- Rank vs 10 years ago
- +5
- Places climbed
- Births vs 10 years ago
- 1.05×
- More babies than then
- Share of its own peak
- 53.5%
- Peak was 2023 (43)
- Years since peak
- 2
- Years
- Year-to-year steadiness
- Shifting
- 24.2% average annual change
Spellings of Kailen
Kailen is not the most common spelling — Allen is, with 22.0% against Kailen's 0.08%.
Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.
Where Kailen is used — boys
Across 1910–2025, Kailen was most concentrated in California — about 1 in — boys, against 1 in 495,163 across all states with data. It was least common in Texas (1 in —).
Most concentrated
- 1California1 in —
- 2Florida1 in —
- 3Georgia1 in —
- 4Texas1 in —
Shading is the share of that state's recorded boys given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings. Kailen has too little recent state data to map, so this covers all years from 1910.
Where Kailen is used — girls
Across 1910–2025, Kailen was most concentrated in California — about 1 in — girls, against 1 in 681,066 across all states with data. It was least common in Washington (1 in —).
Most concentrated
- 1California1 in —
- 2Louisiana1 in —
- 3South Carolina1 in —
- 4Texas1 in —
- 5Washington1 in —
Shading is the share of that state's recorded girls given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings. Kailen has too little recent state data to map, so this covers all years from 1910.
Kailen around the world
Where Kailen ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.
- England & Wales1996–2025#5,137in 2025
- Scotland2016–2021#720in 2021
- Ireland2022–2022#779in 2022
- Canada1991–2022#1,819in 2022
- South Australia1990–2009#708in 2009
Popularity data from Office for National Statistics, National Records of Scotland, Central Statistics Office, Statistics Canada and Consumer and Business Services (South Australia). ONS, NRS data under Open Government Licence v3.0. CSO, CBS SA data under CC BY 4.0. StatCan data under Statistics Canada Open Licence.
Kailen by the numbers
The raw record for each sex the name is used for.
As a boy's name
Names similar to Kailen
Matched on shared beginnings and endings, similar length, and comparable popularity.
Sibling names for Kailen
Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.