How Many People Are Named Rhiannon?
An estimated 14,793 people in the United States have the first name Rhiannon. It is almost exclusively a female name. The average bearer is 29 years old, and Rhiannon peaked in popularity in 1999 with 651 births that year.
Below you will find a full statistical profile of Rhiannon 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 Rhiannon paired with any surname.
Estimated Living Americans
14,793
About 1 in 23,170 people in the U.S.
Rarity
Uncommon
Predicted Gender
Female
100.0% confidence
Average Age
29
years old
Peak Year
1999
651 births
Total Registered
15,330
since 1880
Gender Distribution for Rhiannon
Rhiannon is almost exclusively a female name. Out of 15,330 total births registered, 100.0% were female.
Rhiannon as a male name
Ranked #7,143 in 1982
5 male births in 1982
Peak: 1982 (5 births)
Rhiannon as a female name
Ranked #1,310 in 2024
175 female births in 2024
Peak: 1999 (651 births)
Rhiannon: Popularity Over Time
SSA records for Rhiannon span from the 1970s to the 2020s, covering 6 decades of naming data. The most popular decade for this name was the 2000s, when 4,075 babies were registered. Rhiannon has declined significantly from its peak in the 2000s. Recent registrations are a fraction of what they were at the name's height.
Rhiannon by Decade
How has Rhiannon 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.
Rhiannon by State
Birth registrations for Rhiannon span all 46 states and territories in the SSA database. The highest counts are in California, Texas, New York. The lowest are in New Hampshire, Wyoming, South Dakota. On average, about 276 Rhiannons were registered per state.
Rhiannon + Last Name Combinations
How many people share a full name with Rhiannon as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Rhiannon
Other first names starting with R with a similar number of bearers.
Rhiannon: Questions and Answers
How many people in the U.S. are named Rhiannon?
We estimate approximately 14,793 people named Rhiannon 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 23,170 Americans share this first name.
Is Rhiannon a common name?
Rhiannon is classified as "Uncommon" and is more popular than 98.2% of all first names in the SSA database. A total of 15,330 births have been registered with this name since 1880.
When was Rhiannon most popular?
Rhiannon reached peak popularity in 1999, when 651 babies were given this name. The average age of a living person named Rhiannon is approximately 29 years old, reflecting when the name was most commonly given.
Is Rhiannon a female name?
Rhiannon is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Rhiannon Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Rhiannon Smith, Rhiannon Johnson, Rhiannon 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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