How Many People Are Named Riordan?
An estimated 281 people in the United States have the first name Riordan. It is almost exclusively a male name. The average bearer is 18 years old, and Riordan peaked in popularity in 2013 with 18 births that year.
Below you will find a full statistical profile of Riordan 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 Riordan paired with any surname.
Estimated Living Americans
281
About 1 in 1,219,766 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
18
years old
Peak Year
2013
18 births
Total Registered
285
since 1880
Gender Distribution for Riordan
Riordan is almost exclusively a male name. Out of 285 total births registered, 100.0% were male.
Riordan as a male name
Ranked #7,636 in 2023
11 male births in 2023
Peak: 2013 (18 births)
Riordan: Popularity Over Time
SSA records for Riordan span from the 1980s to the 2020s, covering 5 decades of naming data. The most popular decade for this name was the 2010s, when 97 babies were registered. While Riordan is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Riordan by Decade
How has Riordan 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.
Riordan + Last Name Combinations
How many people share a full name with Riordan as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Riordan
Other first names starting with R with a similar number of bearers.
Riordan: Questions and Answers
How many people in the U.S. are named Riordan?
We estimate approximately 281 people named Riordan 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 1,219,766 Americans share this first name.
Is Riordan a common name?
Riordan is classified as "Very Rare" and is more popular than 78.5% of all first names in the SSA database. A total of 285 births have been registered with this name since 1880.
When was Riordan most popular?
Riordan reached peak popularity in 2013, when 18 babies were given this name. The average age of a living person named Riordan is approximately 18 years old, reflecting when the name was most commonly given.
Is Riordan a male name?
Riordan is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Riordan Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Riordan Smith, Riordan Johnson, Riordan 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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