How Many People Are Named Eustacia?
An estimated 138 people in the United States have the first name Eustacia. It is almost exclusively a female name. The average bearer is 47 years old, and Eustacia peaked in popularity in 1971 with 15 births that year.
Below you will find a full statistical profile of Eustacia 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 Eustacia paired with any surname.
Estimated Living Americans
138
About 1 in 2,483,727 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
47
years old
Peak Year
1971
15 births
Total Registered
156
since 1880
Gender Distribution for Eustacia
Eustacia is almost exclusively a female name. Out of 156 total births registered, 100.0% were female.
Eustacia as a female name
Ranked #15,820 in 2000
5 female births in 2000
Peak: 1971 (15 births)
Eustacia: Popularity Over Time
SSA records for Eustacia span from the 1930s to the 2000s, covering 7 decades of naming data. The most popular decade for this name was the 1970s, when 67 babies were registered. Eustacia has declined significantly from its peak in the 1970s. Recent registrations are a fraction of what they were at the name's height.
Eustacia by Decade
How has Eustacia 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.
Eustacia + Last Name Combinations
How many people share a full name with Eustacia as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Eustacia
Other first names starting with E with a similar number of bearers.
Eustacia: Questions and Answers
How many people in the U.S. are named Eustacia?
We estimate approximately 138 people named Eustacia 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 2,483,727 Americans share this first name.
Is Eustacia a common name?
Eustacia is classified as "Very Rare" and is more popular than 69.1% of all first names in the SSA database. A total of 156 births have been registered with this name since 1880.
When was Eustacia most popular?
Eustacia reached peak popularity in 1971, when 15 babies were given this name. The average age of a living person named Eustacia is approximately 47 years old, reflecting when the name was most commonly given.
Is Eustacia a female name?
Eustacia is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Eustacia Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Eustacia Smith, Eustacia Johnson, Eustacia 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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