How Many People Are Named Isobelle?
An estimated 88 people in the United States have the first name Isobelle. It is almost exclusively a female name. The average bearer is 16 years old, and Isobelle peaked in popularity in 2008 with 8 births that year.
Below you will find a full statistical profile of Isobelle 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 Isobelle paired with any surname.
Key Insights
- Isobelle is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
88
About 1 in 3,894,936 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
16
years old
Peak Year
2008
8 births
Total Registered
99
since 1880
Gender Distribution for Isobelle
Isobelle is almost exclusively a female name. Out of 99 total births registered, 100.0% were female.
Isobelle as a female name
Ranked #14,167 in 2021
6 female births in 2021
Peak: 2008 (8 births)
Isobelle: Popularity Over Time
SSA records for Isobelle span from the 1910s to the 2020s, covering 4 decades of naming data. The most popular decade for this name was the 2010s, when 43 babies were registered. Isobelle has declined significantly from its peak in the 2010s. Recent registrations are a fraction of what they were at the name's height.
Isobelle by Decade
How has Isobelle 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.
Isobelle + Last Name Combinations
How many people share a full name with Isobelle as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Isobelle
Other first names starting with I with a similar number of bearers.
Isobelle: Questions and Answers
How many people in the U.S. are named Isobelle?
We estimate approximately 88 people named Isobelle 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 3,894,936 Americans share this first name.
Is Isobelle a common name?
Isobelle is classified as "Very Rare" and is more popular than 62.7% of all first names in the SSA database. A total of 99 births have been registered with this name since 1880.
When was Isobelle most popular?
Isobelle reached peak popularity in 2008, when 8 babies were given this name. The average age of a living person named Isobelle is approximately 16 years old, reflecting when the name was most commonly given.
Is Isobelle a female name?
Isobelle is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Isobelle Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Isobelle Smith, Isobelle Johnson, Isobelle 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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