How Many People Are Named Cydni?
An estimated 571 people in the United States have the first name Cydni. It is almost exclusively a female name. The average bearer is 28 years old, and Cydni peaked in popularity in 1996 with 37 births that year.
Below you will find a full statistical profile of Cydni 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 Cydni paired with any surname.
Estimated Living Americans
571
About 1 in 600,270 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
28
years old
Peak Year
1996
37 births
Total Registered
590
since 1880
Gender Distribution for Cydni
Cydni is almost exclusively a female name. Out of 590 total births registered, 100.0% were female.
Cydni as a female name
Ranked #11,346 in 2021
8 female births in 2021
Peak: 1996 (37 births)
Cydni: Popularity Over Time
SSA records for Cydni span from the 1960s to the 2020s, covering 7 decades of naming data. The most popular decade for this name was the 1990s, when 251 babies were registered. Cydni has declined significantly from its peak in the 1990s. Recent registrations are a fraction of what they were at the name's height.
Cydni by Decade
How has Cydni 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.
Cydni + Last Name Combinations
How many people share a full name with Cydni as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Cydni
Other first names starting with C with a similar number of bearers.
Cydni: Questions and Answers
How many people in the U.S. are named Cydni?
We estimate approximately 571 people named Cydni 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 600,270 Americans share this first name.
Is Cydni a common name?
Cydni is classified as "Very Rare" and is more popular than 85.8% of all first names in the SSA database. A total of 590 births have been registered with this name since 1880.
When was Cydni most popular?
Cydni reached peak popularity in 1996, when 37 babies were given this name. The average age of a living person named Cydni is approximately 28 years old, reflecting when the name was most commonly given.
Is Cydni a female name?
Cydni is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Cydni Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Cydni Smith, Cydni Johnson, Cydni 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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