How Many People Are Named Fionna?
An estimated 719 people in the United States have the first name Fionna. It is almost exclusively a female name. The average bearer is 20 years old, and Fionna peaked in popularity in 2012 with 41 births that year.
Below you will find a full statistical profile of Fionna 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 Fionna paired with any surname.
Estimated Living Americans
719
About 1 in 476,710 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
20
years old
Peak Year
2012
41 births
Total Registered
732
since 1880
Gender Distribution for Fionna
Fionna is almost exclusively a female name. Out of 732 total births registered, 100.0% were female.
Fionna as a female name
Ranked #9,101 in 2024
11 female births in 2024
Peak: 2012 (41 births)
Fionna: Popularity Over Time
SSA records for Fionna span from the 1970s to the 2020s, covering 6 decades of naming data. The most popular decade for this name was the 2010s, when 262 babies were registered. Fionna has declined significantly from its peak in the 2010s. Recent registrations are a fraction of what they were at the name's height.
Fionna by Decade
How has Fionna 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.
Fionna by State
Birth registrations for Fionna span all 4 states and territories in the SSA database. The highest counts are in California, Florida, Illinois. The lowest are in New York, Illinois, Florida. On average, about 12 Fionnas were registered per state.
Fionna + Last Name Combinations
How many people share a full name with Fionna as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Fionna
Other first names starting with F with a similar number of bearers.
Fionna: Questions and Answers
How many people in the U.S. are named Fionna?
We estimate approximately 719 people named Fionna 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 476,710 Americans share this first name.
Is Fionna a common name?
Fionna is classified as "Very Rare" and is more popular than 87.8% of all first names in the SSA database. A total of 732 births have been registered with this name since 1880.
When was Fionna most popular?
Fionna reached peak popularity in 2012, when 41 babies were given this name. The average age of a living person named Fionna is approximately 20 years old, reflecting when the name was most commonly given.
Is Fionna a female name?
Fionna is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Fionna Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Fionna Smith, Fionna Johnson, Fionna 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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