How Many People Are Named Rosilyn?
An estimated 476 people in the United States have the first name Rosilyn. It is almost exclusively a female name. The average bearer is 50 years old, and Rosilyn peaked in popularity in 1949 with 22 births that year.
Below you will find a full statistical profile of Rosilyn 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 Rosilyn paired with any surname.
Estimated Living Americans
476
About 1 in 720,072 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
50
years old
Peak Year
1949
22 births
Total Registered
642
since 1880
Gender Distribution for Rosilyn
Rosilyn is almost exclusively a female name. Out of 642 total births registered, 100.0% were female.
Rosilyn as a female name
Ranked #10,995 in 2023
9 female births in 2023
Peak: 1949 (22 births)
Rosilyn: Popularity Over Time
SSA records for Rosilyn span from the 1930s to the 2020s, covering 10 decades of naming data. The most popular decade for this name was the 1950s, when 141 babies were registered. Rosilyn has declined significantly from its peak in the 1950s. Recent registrations are a fraction of what they were at the name's height.
Rosilyn by Decade
How has Rosilyn 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.
Rosilyn by State
Rosilyn + Last Name Combinations
How many people share a full name with Rosilyn as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Rosilyn
Other first names starting with R with a similar number of bearers.
Rosilyn: Questions and Answers
How many people in the U.S. are named Rosilyn?
We estimate approximately 476 people named Rosilyn 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 720,072 Americans share this first name.
Is Rosilyn a common name?
Rosilyn is classified as "Very Rare" and is more popular than 84.1% of all first names in the SSA database. A total of 642 births have been registered with this name since 1880.
When was Rosilyn most popular?
Rosilyn reached peak popularity in 1949, when 22 babies were given this name. The average age of a living person named Rosilyn is approximately 50 years old, reflecting when the name was most commonly given.
Is Rosilyn a female name?
Rosilyn is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Rosilyn Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Rosilyn Smith, Rosilyn Johnson, Rosilyn 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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