How Many People Are Named Cybil?
An estimated 558 people in the United States have the first name Cybil. It is almost exclusively a female name. The average bearer is 36 years old, and Cybil peaked in popularity in 1975 with 48 births that year.
Below you will find a full statistical profile of Cybil 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 Cybil paired with any surname.
Estimated Living Americans
558
About 1 in 614,255 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
36
years old
Peak Year
1975
48 births
Total Registered
593
since 1880
Gender Distribution for Cybil
Cybil is almost exclusively a female name. Out of 593 total births registered, 100.0% were female.
Cybil as a female name
Ranked #13,812 in 2024
6 female births in 2024
Peak: 1975 (48 births)
Cybil: Popularity Over Time
SSA records for Cybil span from the 1970s to the 2020s, covering 6 decades of naming data. The most popular decade for this name was the 1970s, when 268 babies were registered. Cybil has declined significantly from its peak in the 1970s. Recent registrations are a fraction of what they were at the name's height.
Cybil by Decade
How has Cybil 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.
Cybil by State
Birth registrations for Cybil span all 4 states and territories in the SSA database. The highest counts are in California, Florida, Ohio. The lowest are in Texas, Ohio, Florida. On average, about 8 Cybils were registered per state.
Cybil + Last Name Combinations
How many people share a full name with Cybil as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Cybil
Other first names starting with C with a similar number of bearers.
Cybil: Questions and Answers
How many people in the U.S. are named Cybil?
We estimate approximately 558 people named Cybil 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 614,255 Americans share this first name.
Is Cybil a common name?
Cybil is classified as "Very Rare" and is more popular than 85.6% of all first names in the SSA database. A total of 593 births have been registered with this name since 1880.
When was Cybil most popular?
Cybil reached peak popularity in 1975, when 48 babies were given this name. The average age of a living person named Cybil is approximately 36 years old, reflecting when the name was most commonly given.
Is Cybil a female name?
Cybil is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Cybil Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Cybil Smith, Cybil Johnson, Cybil 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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