How Many People Are Named Reilley?
An estimated 283 people in the United States have the first name Reilley. It is used for both genders, with 62.7% female. The average bearer is 22 years old, and Reilley peaked in popularity in 2008 with 26 births that year.
Below you will find a full statistical profile of Reilley 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 Reilley paired with any surname.
Estimated Living Americans
283
About 1 in 1,211,146 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
62.7% confidence
Average Age
22
years old
Peak Year
2008
26 births
Total Registered
287
since 1880
Gender Distribution for Reilley
Reilley is a genuinely unisex name, used for both males (37.3%) and females (62.7%). Out of 287 total births registered, 107 were male and 180 were female.
Reilley as a male name
Ranked #13,745 in 2016
5 male births in 2016
Peak: 2008 (16 births)
Reilley as a female name
Ranked #14,286 in 2013
7 female births in 2013
Peak: 2004 (17 births)
Reilley: Popularity Over Time
SSA records for Reilley span from the 1990s to the 2010s, covering 3 decades of naming data. The most popular decade for this name was the 2000s, when 182 babies were registered. Reilley has declined significantly from its peak in the 2000s. Recent registrations are a fraction of what they were at the name's height.
Reilley by Decade
How has Reilley 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.
Reilley + Last Name Combinations
How many people share a full name with Reilley as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Reilley
Other first names starting with R with a similar number of bearers.
Reilley: Questions and Answers
How many people in the U.S. are named Reilley?
We estimate approximately 283 people named Reilley 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 1,211,146 Americans share this first name.
Is Reilley a common name?
Reilley is classified as "Very Rare" and is more popular than 78.6% of all first names in the SSA database. A total of 287 births have been registered with this name since 1880.
When was Reilley most popular?
Reilley reached peak popularity in 2008, when 26 babies were given this name. The average age of a living person named Reilley is approximately 22 years old, reflecting when the name was most commonly given.
Is Reilley a female name?
Reilley is predominantly female. 62.7% of people with this name are female. See the gender breakdown above for full details.
How many Reilley Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Reilley Smith, Reilley Johnson, Reilley 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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