Girls' name · since 1979
Cassiopeia
391 babies named Cassiopeia in U.S. Social Security records since 1979, with the highest year being 2022. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.
- #13,692 of 72,339
- all-time among girls
- #9,028 of 17,297
- 2025 SSA year
- 391
- born since 1979
- 1980s
- peak decade
Cassiopeia currently ranks #9028 among girls' names in America, with 391 babies recorded since 1979.
Cassiopeia has 391 recorded births among girls since 1979, per the U.S. Social Security Administration, ranked #9028 as of the latest data, more common than 48% of girls, busiest in the 1980s -- 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.
- #13,692 of 72,339 all-time among girls
- #9,028 of 17,297 2025 SSA year
- 391 born since 1979
- 1980s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Cassiopeia ranks #13,692 of 72,339 girls' names by all-time recorded births (highest first) and #9,028 of 17,297 among girls' names in 2025. 391 born since 1979, peaking in the 1980s.
- #13,692 of 72,339
- all-time among girls
- #9,028 of 17,297
- 2025 SSA year
- 391
- born since 1979
- 1980s
- peak decade
Cassiopeia's 391 recorded births place it above 81.04% of the 72,339 girls names in the full SSA archive.
No state rows cleared SSA’s public reporting threshold for this name.
How Cassiopeia compares
391 Top 50% higher than 50% 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
Cassiopeia's all-time total is 4% above the median girls name, and Olivia still leads by a wide margin.
| Metric | Cassiopeia | Median girls name (Kyann) | #1 girls name (Olivia) |
|---|---|---|---|
| All-time total births | 391 | 376 | 567,345 |
| Peak-year births | 18 | 21 | 19,840 |
Cassiopeia's usage pattern, beyond the headline number
Splitting Cassiopeia's full recorded timeline at 2002, 52% of its total births fall in the more recent half of the record versus 48% in the earlier half -- a fairly even split across the full record. Its quietest year on record was 1992, with just 5 recorded births -- worth weighing against the 2022 peak of 18 to see the full range of the name's swing in popularity.
Cassiopeia popularity over time
Annual U.S. births registered with the Social Security Administration · 1979–2025
- Peak year (2022)
- 18
- Annual births at peak, across 47 years of records
Cassiopeia by decade
1980s is the heaviest window (109 births, 28% of the file).
1980s was Cassiopeia's strongest decade.
109 babies received the name during that ten-year window, about 28% of all-time use.
Cassiopeia births by decade
Total births in each ten-year window
- 1970s 9
1970s
9 births
- 1980s
1980s
109 births
- 1990s
1990s
54 births
- 2000s
2000s
50 births
- 2010s
2010s
84 births
- 2020s
2020s
85 births
What this shows Peak: 1980s at 109 births (28% of all-time use).
Frequently Asked Questions
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What to do with Cassiopeia's data
- Cassiopeia's usage has stayed within range of its 1980s decade-level peak (109 total births) through the 2020s (85) -- a comparatively stable name, not a fading trend.
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Cassiopeia
Nearby Names Like Cassiopeia
Names with a similar sound, spelling, or feel to Cassiopeia
Compare Cassiopeia side by side: Cassiopeia vs Cassandra Cassiopeia vs Casey Cassiopeia vs Cassidy
Related Names
Names with a similar popularity rank to Cassiopeia
Nationwide names with similar peak year or record span
Two nationwide peer axes for Cassiopeia: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~2022)
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 Cassiopeia 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.