Name Awesome

Cailyn

#3,727 in 2025Girls' name

Variant of Kaylyn

Cailyn has been given to 5,554 babies in the U.S. since 1979. In 2025 it ranked #3,727 of 17,293 girls’ names in use. Its peak year was 2009, with 401 recorded.

Babies named Cailyn, 2025

1 in 82,900

Cailyn over time, 1880–2025

GirlsBoys
020040060018801900192019401960198020002020

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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Cailyn: meaning, origin, and history

Variant of Kaylyn

Deeper origin not confirmed in the cited records

What Cailyn means

Cailyn is a variant of Kaylyn.

Related names and everyday forms

Related names include Kaylyn.

American usage and historical context

In the United States, 5,549 girls were recorded with the name Cailyn between 1979 and 2025. Its highest annual count was 401 in 2009; its best national rank was #725 in 2009.

Over 5 years its rank fell, from #2,474 in 2020 to #3,727 in 2025. Over 10 years its rank fell, from #1,339 in 2015 to #3,727 in 2025.

In the United States, 5 boys were recorded with the name Cailyn between 2025 and 2025. Its highest annual count was 5 in 2025; its best national rank was #12,343 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.

How common is Cailyn?

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

Among all babies, 2025
1 in 82,900
40 of 3,315,165 births
Among girls only
1 in 40,200
<0.01% of girls
Rank, 2025
#3,727
of 17,293 girls’ names in use
Coin-flip room size
57,449 kids
Even odds of a second one

Where Cailyn 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 500Under 1%

Put another way: gather 57,449 children born in 2025 and it's an even bet that one of them is another Cailyn. In a class of 30 the chance is Under 1%.

When Cailyns were born

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

Median birth year
2008
About 17 years old
Biggest decade
2000s
44.1% of all use
Born in the last 25 years
79.4%
A modern name
Recorded since 1950
5,549
People you could plausibly meet
Choose a decade

2000s — 44.1% of all recorded uses (2,445).

Is Cailyn 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
−434
Places dropped
Rank vs 5 years ago
−1,253
Places dropped
Rank vs 10 years ago
−2,388
Places dropped
Births vs 10 years ago
0.23×
Fewer babies than then
Share of its own peak
10.0%
Peak was 2009 (401)
Years since peak
16
Years
Year-to-year steadiness
Shifting
17.4% average annual change
Best rank ever
#725
2009

Spellings of Cailyn

Cailyn is not the most common spelling — Carolyn is, with 31.9% against Cailyn's 0.32%.

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 Cailyn is used

Across 2016–2025, Cailyn was most concentrated in Georgia — about 1 in 11,111 girls, against 1 in 32,750 across all states with data. It was least common in Virginia (1 in 100,000).

19 per 100,000

Most concentrated

  1. 1Georgia1 in 11,111
  2. 2Florida1 in 20,000
  3. 3Mississippi1 in 20,000
  4. 4Pennsylvania1 in 20,000
  5. 5Texas1 in 25,000
  6. 6Alabama1 in 33,333
  7. 7South Carolina1 in 33,333
  8. 8North Carolina1 in 50,000

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.

Cailyn around the world

Where Cailyn 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
    2001–2018
    #5,666
    in 2018
  • Scotland
    2007–2017
    #666
    in 2017
  • Northern Ireland
    2011–2011
    #444
    in 2011
  • Ireland
    2008–2008
    #665
    in 2008
  • Canada
    1993–2019
    #2,941
    in 2019
  • South Australia
    1993–2010
    #801
    in 2010

Popularity data from Office for National Statistics, National Records of Scotland, Northern Ireland Statistics and Research Agency, Central Statistics Office, Statistics Canada and Consumer and Business Services (South Australia). ONS, NRS, NISRA data under Open Government Licence v3.0. CSO, CBS SA data under CC BY 4.0. StatCan data under Statistics Canada Open Licence.

Cailyn by the numbers

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

As a girl's name

Rank in 2025
#3,727
Trend vs 5 yrs ago
Down 1,253
Best rank ever
#725
2009
Peak year
2009
401 that year
First recorded
1979
Last recorded
2025
All-time count
5,549
Count in 2025
40

As a boy's name

Rank in 2025
#12,343
Trend vs 5 yrs ago
New entry
Best rank ever
#12,343
2025
Peak year
2025
5 that year
First recorded
2025
Last recorded
2025
All-time count
5
Count in 2025
5

Names similar to Cailyn

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

CaitlynCaileyCailinCaileeJaylynJailynOaklynJaslynMarlynCarlynCaitlynnAvalynEvalynEmelynJoslynKaylynMaelynJerilynKarolynKathlynCaelynAdilynKarlynMadlyn

Names with a curve like Cailyn

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

HayleighKaylenAbriannaJaylenJakaylaKendylYoselinYamiletJoselinAbbygailMakaylahMakenzi

Sibling names for Cailyn

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 Cailyn

Top names of 2009, Cailyn's peak yearThe 2000s in fullOther names that peaked in 2009Girls' names starting with C