How Many People Are Named Castiel?
An estimated 3,667 people in the United States have the first name Castiel. It is predominantly male (99.1%). The average bearer is 8 years old, and Castiel peaked in popularity in 2019 with 336 births that year.
Below you will find a full statistical profile of Castiel 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 Castiel paired with any surname.
Key Insights
- Castiel is a modern name. With an average bearer age of just 8, it has gained most of its popularity in recent years.
Estimated Living Americans
3,667
About 1 in 93,470 people in the U.S.
Rarity
Rare
Predicted Gender
Male
99.1% confidence
Average Age
8
years old
Peak Year
2019
336 births
Total Registered
3,693
since 1880
Gender Distribution for Castiel
Castiel is almost exclusively a male name. Out of 3,693 total births registered, 99.1% were male.
Castiel as a male name
Ranked #816 in 2024
306 male births in 2024
Peak: 2019 (336 births)
Castiel as a female name
Ranked #15,584 in 2020
5 female births in 2020
Peak: 2016 (7 births)
Castiel: Popularity Over Time
SSA records for Castiel span from the 2000s to the 2020s, covering 3 decades of naming data. The most popular decade for this name was the 2010s, when 2,267 babies were registered. While Castiel is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Castiel by Decade
How has Castiel 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.
Castiel by State
Birth registrations for Castiel span all 38 states and territories in the SSA database. The highest counts are in Texas, California, Florida. The lowest are in South Carolina, Rhode Island, Nebraska. On average, about 76 Castiels were registered per state.
Castiel + Last Name Combinations
How many people share a full name with Castiel as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Castiel
Other first names starting with C with a similar number of bearers.
Castiel: Questions and Answers
How many people in the U.S. are named Castiel?
We estimate approximately 3,667 people named Castiel 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 93,470 Americans share this first name.
Is Castiel a common name?
Castiel is classified as "Rare" and is more popular than 95.8% of all first names in the SSA database. A total of 3,693 births have been registered with this name since 1880.
When was Castiel most popular?
Castiel reached peak popularity in 2019, when 336 babies were given this name. The average age of a living person named Castiel is approximately 8 years old, reflecting when the name was most commonly given.
Is Castiel a male name?
Castiel is predominantly male. 99.1% of people with this name are male. See the gender breakdown above for full details.
How many Castiel Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Castiel Smith, Castiel Johnson, Castiel 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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