How Many People Are Named Cynethia?
An estimated 167 people in the United States have the first name Cynethia. It is almost exclusively a female name. The average bearer is 52 years old, and Cynethia peaked in popularity in 1967 with 15 births that year.
Below you will find a full statistical profile of Cynethia 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 Cynethia paired with any surname.
Estimated Living Americans
167
About 1 in 2,052,421 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
52
years old
Peak Year
1967
15 births
Total Registered
190
since 1880
Gender Distribution for Cynethia
Cynethia is almost exclusively a female name. Out of 190 total births registered, 100.0% were female.
Cynethia as a female name
Ranked #10,738 in 1992
7 female births in 1992
Peak: 1967 (15 births)
Cynethia: Popularity Over Time
SSA records for Cynethia span from the 1950s to the 1990s, covering 5 decades of naming data. The most popular decade for this name was the 1980s, when 59 babies were registered. Cynethia has declined significantly from its peak in the 1980s. Recent registrations are a fraction of what they were at the name's height.
Cynethia by Decade
How has Cynethia 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.
Cynethia + Last Name Combinations
How many people share a full name with Cynethia as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Cynethia
Other first names starting with C with a similar number of bearers.
Cynethia: Questions and Answers
How many people in the U.S. are named Cynethia?
We estimate approximately 167 people named Cynethia 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 2,052,421 Americans share this first name.
Is Cynethia a common name?
Cynethia is classified as "Very Rare" and is more popular than 71.8% of all first names in the SSA database. A total of 190 births have been registered with this name since 1880.
When was Cynethia most popular?
Cynethia reached peak popularity in 1967, when 15 babies were given this name. The average age of a living person named Cynethia is approximately 52 years old, reflecting when the name was most commonly given.
Is Cynethia a female name?
Cynethia is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Cynethia Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Cynethia Smith, Cynethia Johnson, Cynethia 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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