Girls' name · since 1950
Jillyn
Jillyn has 171 recorded births since 1950 in federal Social Security data, most heavily in 1976 -- full year-by-year trend, decade aggregates, and state rankings follow.
- #21,425 of 72,339
- all-time among girls
- 171
- born since 1950
- 1970s
- peak decade
171 girls have been named Jillyn since 1950, though it isn't currently a top-ranked name.
Jillyn has 171 recorded births among girls since 1950, per the U.S. Social Security Administration, though it falls outside today's most-used girls names, busiest in the 1970s -- see the year-by-year trends, decade totals, and state-level distribution below, all drawn directly from SSA birth-registration files spanning 1950 to 2002.
- #21,425 of 72,339 all-time among girls
- 171 born since 1950
- 1970s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Jillyn ranks #21,425 of 72,339 girls' names by all-time recorded births (highest first). 171 born since 1950, peaking in the 1970s.
- #21,425 of 72,339
- all-time among girls
- 171
- born since 1950
- 1970s
- peak decade
Jillyn's 171 recorded births place it above 70.34% of the 72,339 girls names in the full SSA archive.
The state file records this name in 1 jurisdictions, led by Utah.
Jillyn's usage pattern, beyond the headline number
Splitting Jillyn's full recorded timeline at 1975, 53% of its total births fall in the more recent half of the record versus 47% in the earlier half -- a fairly even split across the full record. Its quietest year on record was 1950, with just 5 recorded births -- worth weighing against the 1976 peak of 10 to see the full range of the name's swing in popularity.
Jillyn popularity over time
Annual U.S. births registered with the Social Security Administration · 1950–2002
- Peak year (1976)
- 10
- Annual births at peak, across 53 years of records
Jillyn by decade
1970s is the heaviest window (57 births, 33% of the file).
1970s was Jillyn's strongest decade.
57 babies received the name during that ten-year window, about 33% of all-time use.
Jillyn births by decade
Total births in each ten-year window
- 1950s 10
1950s
10 births
- 1960s
1960s
41 births
- 1970s
1970s
57 births
- 1980s
1980s
47 births
- 1990s 11
1990s
11 births
- 2000s 5
2000s
5 births
What this shows Peak: 1970s at 57 births (33% of all-time use).
Jillyn by state
Where Jillyn concentrates geographically, total births since 1950
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Utah | | 7 | 4.1% |
7 of 171 births nationwide.
Frequently Asked Questions
How popular is the name Jillyn? ▼
Where does Jillyn sit in the SSA name archive? ▼
When was Jillyn most popular? ▼
Where is Jillyn most popular? ▼
How long has the name Jillyn been used? ▼
What names are similar to Jillyn? ▼
What to do with Jillyn's data
- Jillyn's decade-level peak was the 1970s (57 total births); usage has since declined to 5 in the 2000s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Utah records the most Jillyns (7 births) -- see the full state breakdown if geography matters to your decision. Utah names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Jillyn
Nearby Names Like Jillyn
Names with a similar sound, spelling, or feel to Jillyn
Compare Jillyn side by side: Jillyn vs Jill Jillyn vs Jillian Jillyn vs Jilian
Related Names
Names with a similar number of total births
Nationwide names with similar peak year or record span
Two nationwide peer axes for Jillyn: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~1976)
Similar record span (~52 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, 1950–2002 (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 Jillyn 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.