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Kailyn

#1,825 in 2025Girls' name

Variant of Kaylyn

Kailyn has been given to 14,351 babies in the U.S. since 1981. In 2025 it ranked #1,825 of 17,293 girls’ names in use. Its peak year was 2011, with 793 recorded.

Babies named Kailyn, 2025

1 in 30,100

Kailyn over time, 1880–2025

GirlsBoys
020040060080018801900192019401960198020002020

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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Kailyn: meaning, origin, and history

Variant of Kaylyn

Deeper origin not confirmed in the cited records

What Kailyn means

Kailyn is a variant of Kaylyn.

Origin, language, and formation

Kailyn is used in English.

Related names and everyday forms

Related names include Kaylyn.

American usage and historical context

In the United States, 14,211 girls were recorded with the name Kailyn between 1981 and 2025. Its highest annual count was 793 in 2011; its best national rank was #397 in 2011.

Over 5 years its rank fell, from #1,196 in 2020 to #1,825 in 2025. Over 10 years its rank fell, from #659 in 2015 to #1,825 in 2025.

In the United States, 140 boys were recorded with the name Kailyn between 1998 and 2025. Its highest annual count was 16 in 2024; its best national rank was #5,770 in 2024.

Over 10 years its rank rose, from #13,033 in 2015 to #9,289 in 2025.

Sources & methodologyReferences, data & attribution

Meaning, origin, and language notes draw on the references below.

American popularity figures use published Social Security Administration records for this exact spelling. Counts below five for a name, sex, and year are omitted.

Wiktionary material is available under CC BY-SA 4.0.

How common is Kailyn?

Everything below is computed from the 2025 data — the most recent year available.

Among all babies, 2025
1 in 30,100
110 of 3,315,165 births
Among girls only
1 in 14,600
<0.01% of girls
Rank, 2025
#1,825
of 17,293 girls’ names in use
Coin-flip room size
20,891 kids
Even odds of a second one

Where Kailyn sits on the popularity scale

Rarest published (5 a year)#1 — Olivia (13,544)

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.

Class of 20Under 1%
Class of 30Under 1%
Grade of 100Under 1%
School of 5002%

Put another way: gather 20,891 children born in 2025 and it's an even bet that one of them is another Kailyn. In a class of 30 the chance is Under 1%.

When Kailyns were born

Half of everyone ever recorded as Kailyn was born before 2008 — so the typical Kailyn is around 17 today.

Median birth year
2008
About 17 years old
Biggest decade
2000s
39.3% of all use
Born in the last 25 years
77.5%
A modern name
Recorded since 1950
14,211
People you could plausibly meet
Choose a decade

2000s — 39.3% of all recorded uses (5,584).

Is Kailyn 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
−245
Places dropped
Rank vs 5 years ago
−629
Places dropped
Rank vs 10 years ago
−1,166
Places dropped
Births vs 10 years ago
0.25×
Fewer babies than then
Share of its own peak
13.9%
Peak was 2011 (793)
Years since peak
14
Years
Year-to-year steadiness
Steady
10.7% average annual change
Best rank ever
#397
2011

Spellings of Kailyn

Kailyn is not the most common spelling — Marilyn is, with 26.9% against Kailyn's 1.0%.

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 Kailyn is used

Across 2016–2025, Kailyn was most concentrated in South Carolina — about 1 in 2,632 girls, against 1 in 7,144 across all states with data. It was least common in Oregon (1 in 25,000).

438 per 100,000

Most concentrated

  1. 1South Carolina1 in 2,632
  2. 2Georgia1 in 3,125
  3. 3Alabama1 in 3,226
  4. 4Mississippi1 in 3,333
  5. 5North Carolina1 in 4,000
  6. 6Louisiana1 in 4,348
  7. 7District of Columbia1 in 4,762
  8. 8Virginia1 in 4,762

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.

Kailyn around the world

Where Kailyn 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 & Wales
    2004–2024
    #4,844
    in 2024
  • Scotland
    2004–2014
    #537
    in 2014
  • Ireland
    2008–2008
    #862
    in 2008
  • France
    2006–2019
    #5,577
    in 2019
  • Canada
    1991–2022
    #2,318
    in 2022
  • South Australia
    1996–2011
    #840
    in 2011

Popularity data from Office for National Statistics, National Records of Scotland, Central Statistics Office, Institut national de la statistique et des études économiques, 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. INSEE data under Licence Ouverte / Etalab 2.0. StatCan data under Statistics Canada Open Licence.

Kailyn by the numbers

The raw record for each sex the name is used for.

As a girl's name

Rank in 2025
#1,825
Trend vs 5 yrs ago
Down 629
Best rank ever
#397
2011
Peak year
2011
793 that year
First recorded
1981
Last recorded
2025
All-time count
14,211
Count in 2025
110

As a boy's name

Rank in 2025
#9,289
Trend vs 5 yrs ago
New entry
Best rank ever
#5,770
2024
Peak year
2024
16 that year
First recorded
1998
Last recorded
2025
All-time count
140
Count in 2025
8

Names similar to Kailyn

Matched on shared beginnings and endings, similar length, and comparable popularity.

KaitlynKaileeKaileyKailaKailaniKaislynJaelynKaiyaKaelynKaithlynRaelynKaylynJazlynJoslynKatlynRoslynKairiKaitlynnEvalynAdelynKailahKailynnKaiaMarlyn

Names with a curve like Kailyn

Not spelling — timing. These names rose, peaked and faded in the same years as Kailyn, so they read as being from the same moment even when they look nothing alike.

EmmaleeLexieKyleighAshlynnNatalyMadisynAllyZoieAbbigailArelyJoselynAnsley

Sibling names for Kailyn

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

Explore around Kailyn

Top names of 2011, Kailyn's peak yearThe 2010s in fullOther names that peaked in 2011Girls' names starting with K