Cassiopeia
- US rank
- #8,860
- Syllables
- 4
- Peak
- #4,737 in 1984
11 babies were named Cassiopeia in the US in 2025. It has climbed 686 places in five years.
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US births per million girls, 1979–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Cassiopeia you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- How commonAbout 1 in every 147,059 baby girls born in the US in 2025 was named Cassiopeia, 11 babies in all. In a typical school of 500 kids, your Cassiopeia would very likely be the only one.
- HistoryCassiopeia first shows up in US birth records in 1979, the first year at least 5 babies got it. It has been in use for 46 years since.
- Best yearIts best year was 1984, when it reached #4,737.
- TrendCassiopeia has climbed 686 places in the US rankings over the last five years and now sits at #8,860. Fast risers like this often keep climbing, so expect to hear it more.
About the name Cassiopeia
Cassiopeia is a girl name. It has 10 letters and 4 syllables, starting with C and ending in “-eia”. US birth records list Cassiopeia for girls from 1979 to 2025, in 40 of those 47 years. Its best year was 1984, when it ranked #4,737 among girl names. In 2025 it ranked #8,860, with 11 babies.
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1970s | 5.6 | 178,571 girls |
| 1980s | 6.4 | 157,480 girls |
| 1990s | 3.0 | 334,448 girls |
| 2000s | 2.7 | 366,300 girls |
| 2010s | 4.8 | 207,900 girls |
| 2020s | 8.7 | 114,504 girls |
Questions about the name Cassiopeia
Is Cassiopeia a boy or girl name?
Cassiopeia is a girl name.
How popular is the name Cassiopeia?
Cassiopeia ranked #8,860 for US girls in 2025, given to 11 babies. Its best year was 1984 (#4,737).