How Many People Are Named Grainne?
An estimated 89 people in the United States have the first name Grainne. It is almost exclusively a female name. The average bearer is 29 years old, and Grainne peaked in popularity in 1989 with 9 births that year.
Below you will find a full statistical profile of Grainne 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 Grainne paired with any surname.
Key Insights
- Grainne is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
89
About 1 in 3,851,172 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
29
years old
Peak Year
1989
9 births
Total Registered
92
since 1880
Gender Distribution for Grainne
Grainne is almost exclusively a female name. Out of 92 total births registered, 100.0% were female.
Grainne as a female name
Ranked #16,176 in 2007
6 female births in 2007
Peak: 1989 (9 births)
Grainne: Popularity Over Time
SSA records for Grainne span from the 1960s to the 2000s, covering 5 decades of naming data. The most popular decade for this name was the 2000s, when 50 babies were registered. Grainne remains highly popular today, with recent registration numbers near its historical peak.
Grainne by Decade
How has Grainne 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.
Grainne by State
Grainne + Last Name Combinations
How many people share a full name with Grainne as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Grainne
Other first names starting with G with a similar number of bearers.
Grainne: Questions and Answers
How many people in the U.S. are named Grainne?
We estimate approximately 89 people named Grainne 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 3,851,172 Americans share this first name.
Is Grainne a common name?
Grainne is classified as "Very Rare" and is more popular than 62.9% of all first names in the SSA database. A total of 92 births have been registered with this name since 1880.
When was Grainne most popular?
Grainne reached peak popularity in 1989, when 9 babies were given this name. The average age of a living person named Grainne is approximately 29 years old, reflecting when the name was most commonly given.
Is Grainne a female name?
Grainne is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Grainne Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Grainne Smith, Grainne Johnson, Grainne 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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