Jillyn
Jillyn was last recorded in 2002, when 5 babies were given it; 171 Americans have been recorded with it between 1950 and 2002 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Jillyn by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Jillyn?
Unranked in 2025
Its last girls’ rank on record is #16,622, in 2002; SSA lists a name only in years with 5 or more births.
10 babies in 1976, the peak
Jillyn peaked in 1976, when 10 girls were given it, #5,761 among girls’ names. It was not recorded in 2025.
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 2002 | 5 | #16,622 | 2.8 |
| 1996 | 5 | #14,480 | 2.9 |
| 1992 | 6 | #12,418 | 3.3 |
| 1989 | 5 | #13,254 | 2.7 |
| 1988 | 8 | #8,728 | 4.5 |
| 1987 | 6 | #10,418 | 3.5 |
| 1985 | 6 | #9,822 | 3.5 |
| 1983 | 10 | #6,407 | 6.0 |
| 1981 | 6 | #9,578 | 3.6 |
| 1980 | 6 | #9,572 | 3.6 |
Every recorded year (27)
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 1979 | 5 | #10,860 | 3.1 |
| 1978 | 8 | #7,232 | 5.2 |
| 1976 | 10 | #5,761 | 6.8 |
| 1975 | 5 | #9,650 | 3.4 |
| 1974 | 6 | #8,099 | 4.1 |
| 1973 | 7 | #6,955 | 4.8 |
| 1971 | 8 | #6,247 | 4.8 |
| 1970 | 8 | #6,023 | 4.6 |
| 1969 | 8 | #5,654 | 4.7 |
| 1968 | 5 | #7,474 | 3.0 |
| 1967 | 5 | #7,220 | 3.0 |
| 1966 | 5 | #6,996 | 3.0 |
| 1965 | 6 | #6,101 | 3.4 |
| 1963 | 5 | #7,034 | 2.6 |
| 1961 | 7 | #5,532 | 3.5 |
| 1951 | 5 | #5,770 | 2.8 |
| 1950 | 5 | #5,638 | 2.9 |
Ranks and shares: girls’ names in each year’s SSA file; share of all girls SSA recorded that year.
Is Jillyn a boy’s or a girl’s name?
Jillyn has been recorded only for girls: SSA lists no boys with the name in 27 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Jillyn: the SSA national file counts each sex separately.
How many people are named Jillyn, and how old are they?
An estimated 158 Americans named Jillyn and born in the U.S. are alive in 2026 (93% of everyone recorded); the median is 50 years old and half are between 41 and 57. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 216 people named Jillyn (216 women and girls, 0 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 162 born in the U.S. The Census count is 33% above that prediction. Possible reasons: the Census counts people born abroad, whom SSA’s files leave out, and it records the name people give, which SSA may have recorded under another spelling or as part of a compound name.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Names spelled alike
Of these 8 names spelled alike, given to 85,293 babies since 1880, Jillyn is the fifth most given (<1% of them). In 2025 none of their 177 babies recorded by SSA was a Jillyn (SSA lists a name only with 5 or more babies of one sex).
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Jillyn
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Jillyn and names like it
- Compare Jillyn and JillianBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1970sJillyn peaked in 1976.
- Utah’s most given namesThe state where SSA recorded the most babies named Jillyn since 1910.
- The top names of 1976The year the most babies were named Jillyn.
- The names of Generation XMost people named Jillyn alive today were born 1965-1980.
- Names starting with JMost given first.