How Many People Are Named Simon Riley?
There are approximately 24 people named Simon Riley living in the United States today. That makes this name combination rare, occurring at a rate of about 1 in 14,281,431 Americans.
This estimate combines SSA birth records for the first name Simon with Census Bureau frequency data for the surname Riley. Below you will find a breakdown of both names, including popularity trends, gender data, and Census background data where it is available.
Estimated People with This Name
24
1 in 14,281,431 Americans
Combination Rarity
Rare
First Name
View full profileSimon
Last Name
View full profileRiley
Simon: Popularity Over Time
Year-by-year SSA birth registrations for the first name Simon. The peak year was 2015 with 1,653 births. The average person named Simon today is 26 years old.
Ancestry of the First Name Simon
In the 2020 Census, the first name Simon was most commonly recorded among people who identified as White (55.46%). The next largest recorded groups were Hispanic (21.34%) and Asian and Pacific Islander (11.52%).
These percentages describe the people who had the first name Simon in the 2020 Census. They do not tell you the deeper origin or meaning of the name itself.
Read this as a snapshot of who already had the name in 2020, not as a trend line. The SSA chart above is still the better way to see how Simon rose or fell over time.
Ancestry of the Riley Surname
The surname Riley was most commonly recorded among people who identified as White in the 2020 Census.
This is a self-reported race and ethnicity breakdown for people who had the surname Riley in the published Census surname tables. It gives useful context around who was recorded with the name, but it does not tell the full family history of every Boone line.
How we calculated this
The first name "Simon" has an estimated frequency of 0.0164% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Riley" appears at a rate of 43.30 per 100,000 people in the 2020 U.S. Census.
We do not use the Census first-name snapshot for the main estimate because it is only published once every 10 years. The latest public first-name Census file is from 2020, which is already 6 years old. SSA birth records plus CDC survival data give a better current estimate of how many people with the first name Simon are likely to be alive now.
Multiplying these frequencies against the U.S. population of ~343 million gives 24 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Simon
Other people with the surname Riley
Simon Riley: Questions and Answers
How many people are named Simon Riley?
We estimate approximately 24 people named Simon Riley are alive in the United States today. The first name Simon is shared by 56,188 Americans, and the surname Riley is shared by 148,422.
How rare is the name Simon Riley?
This name combination is classified as Rare, occurring at a rate of about 1 in 14,281,431 Americans. The first name Simon is uncommon and the surname Riley is common.
Is Simon a male or female name?
Simon is predominantly male, with 99.8% of bearers being male and 0.2% female. It peaked in popularity in 2015 and the average bearer today is 26 years old.
What does the Census say about the first name Simon?
In the 2020 Census, the first name Simon was most commonly recorded among people who identified as White (55.46%). The next largest recorded groups were Hispanic (21.34%) and Asian and Pacific Islander (11.52%). These percentages describe the people who had the name in the 2020 Census, not the deeper origin of the name itself.
Where does this data come from?
First name data comes from the Social Security Administration (1880 to 2024), adjusted for survival using CDC 2023 life tables. When available, first-name Census background data comes from the 2020 U.S. Census Bureau first-name tables. Surname data comes from the 2020 U.S. Census Bureau. Full methodology.
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