How Many People Are Named Rei?
An estimated 958 people in the United States have the first name Rei. It is used for both genders, with 54.3% female. The average bearer is 13 years old, and Rei peaked in popularity in 2019 with 67 births that year.
Below you will find a full statistical profile of Rei 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 Rei paired with any surname.
Estimated Living Americans
958
About 1 in 357,781 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
54.3% confidence
Average Age
13
years old
Peak Year
2019
67 births
Total Registered
969
since 1880
Gender Distribution for Rei
Rei is a genuinely unisex name, used for both males (45.7%) and females (54.3%). Out of 969 total births registered, 443 were male and 526 were female.
Rei as a male name
Ranked #3,860 in 2024
29 male births in 2024
Peak: 2021 (34 births)
Rei as a female name
Ranked #4,980 in 2024
27 female births in 2024
Peak: 2020 (48 births)
Rei: Popularity Over Time
SSA records for Rei span from the 1970s to the 2020s, covering 6 decades of naming data. The most popular decade for this name was the 2010s, when 384 babies were registered. While Rei is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Rei by Decade
How has Rei 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.
Rei by State
Birth registrations for Rei span all 4 states and territories in the SSA database. The highest counts are in California, New York, Texas. The lowest are in Pennsylvania, Texas, New York. On average, about 51 Reis were registered per state.
Rei + Last Name Combinations
How many people share a full name with Rei as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Rei
Other first names starting with R with a similar number of bearers.
Rei: Questions and Answers
How many people in the U.S. are named Rei?
We estimate approximately 958 people named Rei 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 357,781 Americans share this first name.
Is Rei a common name?
Rei is classified as "Very Rare" and is more popular than 89.8% of all first names in the SSA database. A total of 969 births have been registered with this name since 1880.
When was Rei most popular?
Rei reached peak popularity in 2019, when 67 babies were given this name. The average age of a living person named Rei is approximately 13 years old, reflecting when the name was most commonly given.
Is Rei a female name?
Rei is predominantly female. 54.3% of people with this name are female. See the gender breakdown above for full details.
How many Rei Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Rei Smith, Rei Johnson, Rei 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 0 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau estimate. Full methodology.
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