How Many People Are Named Cassiopeia?
An estimated 369 people in the United States have the first name Cassiopeia. It is almost exclusively a female name. The average bearer is 23 years old, and Cassiopeia peaked in popularity in 2022 with 18 births that year.
Below you will find a full statistical profile of Cassiopeia as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Cassiopeia paired with any surname.
Estimated Living Americans
369
About 1 in 928,874 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
23
years old
Peak Year
2022
18 births
Total Registered
380
since 1880
Gender Distribution for Cassiopeia
Cassiopeia is almost exclusively a female name. Out of 380 total births registered, 100.0% were female.
Cassiopeia as a female name
Ranked #8,523 in 2024
12 female births in 2024
Peak: 2022 (18 births)
Cassiopeia: Popularity Over Time
SSA records for Cassiopeia span from the 1970s to the 2020s, covering 6 decades of naming data. The most popular decade for this name was the 1980s, when 109 babies were registered. While Cassiopeia is less common than at its peak in the 1980s, it remains a well-established name with steady registrations.
Cassiopeia by Decade
How has Cassiopeia tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Cassiopeia + Last Name Combinations
How many people share a full name with Cassiopeia as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Cassiopeia
Other first names starting with C with a similar number of bearers.
Cassiopeia: Questions and Answers
How many people in the U.S. are named Cassiopeia?
We estimate approximately 369 people named Cassiopeia are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 928,874 Americans share this first name.
Is Cassiopeia a common name?
Cassiopeia is classified as "Very Rare" and is more popular than 81.5% of all first names in the SSA database. A total of 380 births have been registered with this name since 1880.
When was Cassiopeia most popular?
Cassiopeia reached peak popularity in 2022, when 18 babies were given this name. The average age of a living person named Cassiopeia is approximately 23 years old, reflecting when the name was most commonly given.
Is Cassiopeia a female name?
Cassiopeia is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Cassiopeia Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Cassiopeia Smith, Cassiopeia Johnson, Cassiopeia Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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