Girls' name · since 1979
Cailyn
Cailyn has 5,549 recorded births since 1979 in federal Social Security data, most heavily in 2009 -- full year-by-year trend, decade aggregates, and state rankings follow.
- #2,398 of 72,339
- all-time among girls
- #3,736 of 17,297
- 2025 SSA year
- 5,549
- born since 1979
- 2000s
- peak decade
Cailyn currently ranks #3736 among girls' names in America, with 5,549 babies recorded since 1979.
Cailyn has 5,549 recorded births among girls since 1979, per the U.S. Social Security Administration, ranked #3736 as of the latest data, more common than 78% of girls, busiest in the 2000s -- see the year-by-year trends, decade totals, and state-level distribution below, all drawn directly from SSA birth-registration files spanning 1979 to 2025.
- #2,398 of 72,339 all-time among girls
- #3,736 of 17,297 2025 SSA year
- 5,549 born since 1979
- 2000s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Cailyn ranks #2,398 of 72,339 girls' names by all-time recorded births (highest first) and #3,736 of 17,297 among girls' names in 2025. 5,549 born since 1979, peaking in the 2000s.
- #2,398 of 72,339
- all-time among girls
- #3,736 of 17,297
- 2025 SSA year
- 5,549
- born since 1979
- 2000s
- peak decade
Cailyn's 5,549 recorded births place it above 96.68% of the 72,339 girls names in the full SSA archive.
35 jurisdictions carry state-level records, led by Texas.
How Cailyn compares
5,549 Top 13% higher than 87% of 17,297 names currently given to girls
Based on all-time total births among currently-ranked girls names. Names with fewer occurrences are grouped into wider buckets on the right.
Source U.S. Social Security Administration, national baby name data
How the numbers stack up
Cailyn's all-time total is 15x the median girls name, and Olivia still leads by a wide margin.
| Metric | Cailyn | Median girls name (Kyann) | #1 girls name (Olivia) |
|---|---|---|---|
| All-time total births | 5,549 | 376 | 567,345 |
| Peak-year births | 401 | 21 | 19,840 |
Cailyn's usage pattern, beyond the headline number
Splitting Cailyn's full recorded timeline at 2003, 74% of its total births fall in the more recent half of the record versus 26% in the earlier half -- usage has skewed toward the present, not a one-decade spike. Its quietest year on record was 1979, with just 5 recorded births -- worth weighing against the 2009 peak of 401 to see the full range of the name's swing in popularity.
Cailyn popularity over time - girls
Annual U.S. births registered with the Social Security Administration · 1979–2025
- Peak year (2009)
- 401
- Annual births at peak, across 47 years of records
Cailyn popularity over time - boys
5 total births recorded since 2025 (Cailyn as boys' name)
Cailyn by decade
2000s is the heaviest window (2,445 births, 44% of the file).
2000s was Cailyn's strongest decade.
2,445 babies received the name during that ten-year window, about 44% of all-time use.
Cailyn births by decade
Total births in each ten-year window
- 1970s 5
1970s
5 births
- 1980s 120
1980s
120 births
- 1990s 857
1990s
857 births
- 2000s
2000s
2,445 births
- 2010s
2010s
1,791 births
- 2020s 331
2020s
331 births
What this shows Peak: 2000s at 2,445 births (44% of all-time use).
How Cailyn compares to similarly-sized names
Years in SSA records vs. share of all-time use concentrated in the single peak year, among 15 girls names closest to Cailyn's total volume
Cailyn by state
Where Cailyn concentrates geographically, total births since 1979
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Texas | | 436 | 7.9% |
| #2 | California | | 413 | 7.4% |
| #3 | Florida | | 305 | 5.5% |
| #4 | Pennsylvania | | 227 | 4.1% |
| #5 | New York | | 220 | 4.0% |
| #6 | Ohio | | 207 | 3.7% |
| #7 | Georgia | | 206 | 3.7% |
| #8 | North Carolina | | 188 | 3.4% |
436 of 5,549 births nationwide. Compared to a flat distribution across 35 reporting states.
Cailyn appears in 35 states. Explore state details →
Frequently Asked Questions
How popular is the name Cailyn? ▼
Where does Cailyn sit in the SSA name archive? ▼
When was Cailyn most popular? ▼
Where is Cailyn most popular? ▼
How long has the name Cailyn been used? ▼
What names are similar to Cailyn? ▼
What to do with Cailyn's data
- Cailyn's decade-level peak was the 2000s (2,445 total births); usage has since declined to 331 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Texas records the most Cailyns (436 births) -- see the full state breakdown if geography matters to your decision. Texas names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Cailyn
Nearby Names Like Cailyn
Names with a similar sound, spelling, or feel to Cailyn
Compare Cailyn side by side: Cailyn vs Caitlin Cailyn vs Caitlyn Cailyn vs Caitlynn
Related Names
Names with a similar popularity rank to Cailyn
Nationwide names with similar peak year or record span
Two nationwide peer axes for Cailyn: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~2009)
Similar record span (~46 yrs)
Peak year is the single SSA year with the most births for that name; record span is first-to-latest year in the national files, not a recommendation or shared origin claim.
Data Sources
Data as of August 2026. Source: U.S. Social Security Administration (SSA).
According to the Social Security Administration, this profile draws directly from the agency's public-use baby-name files (updated June 2026). See our methodology for the full extraction, aggregation, and privacy-suppression rules.
Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications, National Data, 1979–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Name Almanac is rendered directly from the Social Security Administration's public baby-name files, no number is typed in by an editor. This profile for Cailyn draws directly on SSA national and state-level files, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.