How Many People Are Named Undine?
An estimated 2 people in the United States have the first name Undine. It is almost exclusively a female name. The average bearer is 108 years old, and Undine peaked in popularity in 1924 with 10 births that year.
Below you will find a full statistical profile of Undine as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, state-by-state birth registrations, and, when available, a 2020 Census snapshot showing who had the name at that point in time. You can also check how many people share the full name Undine paired with any surname.
Key Insights
- With an average bearer age of 108, Undine is a vintage name most associated with earlier generations. Most living bearers were born before 1928.
- Undine is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
2
About 1 in 171,377,169 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
108
years old
Peak Year
1924
10 births
Total Registered
95
since 1880
Gender Distribution for Undine
Undine is almost exclusively a female name. Out of 95 total births registered, 100.0% were female.
Undine as a female name
Ranked #4,167 in 1935
6 female births in 1935
Peak: 1924 (10 births)
Undine in the 2020 Census
The 2020 Census recorded 127 people with the first name Undine, which placed it at #49,173 in the published first-name tables. This is a snapshot of people who already had the name in 2020. The estimated living count elsewhere on this page is different: it is a current estimate built from SSA birth records and age-based survival rates, so the two figures are not expected to match exactly.
Read this section as a snapshot of people who already had the name in 2020. The SSA charts elsewhere on this page are still the better way to see how the name rose, fell, or shifted across generations.
Gender in the 2020 Census
In the 2020 Census, Undine was recorded as predominantly female. Out of 127 people with this name in that snapshot, 2.4% were male and 97.6% were female. That is very close to the long-run birth pattern in SSA records, where the name is female 100.0% of the time.
Census Count
127
people with this name
Census Rank
#49,173
among Census first names
Frequency Rate
0.04
per 100,000 people
Recorded Race and Hispanic Origin in the 2020 Census
In the 2020 Census, the first name Undine was most commonly recorded among people who identified as White (55.74%). The next largest recorded groups were Black (35.25%) and Hispanic (4.92%).
These percentages describe the people who had the first name Undine in the 2020 Census. They do not tell you the deeper meaning or origin of the name itself.
2020 Census demographic breakdown
Each row shows a recorded Census category for people with the first name Undine.
| Group | Share | Count |
|---|---|---|
| White | 55.74% | 68 |
| Black | 35.25% | 43 |
| Hispanic | 4.92% | 6 |
| Asian and Pacific Islander | 2.46% | 3 |
| Two or More Races | 1.64% | 2 |
The Census published separate sex and race/origin tables for first names, so their total counts can differ slightly for the same name. That is why the race section focuses on the demographic mix rather than repeating a second headline count.
Undine: Popularity Over Time
SSA records for Undine span from the 1910s to the 1930s, covering 3 decades of naming data. The most popular decade for this name was the 1910s, when 46 babies were registered. Undine has declined significantly from its peak in the 1910s. Recent registrations are a fraction of what they were at the name's height.
Undine by Decade
How has Undine 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.
Undine + Last Name Combinations
How many people share a full name with Undine as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Undine
Other first names starting with U with a similar number of bearers.
Undine: Questions and Answers
How many people in the U.S. are named Undine?
We estimate approximately 2 people named Undine 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 171,377,169 Americans share this first name.
Is Undine a common name?
Undine is classified as "Very Rare" and is more popular than 4.3% of all first names in the SSA database. A total of 95 births have been registered with this name since 1880.
When was Undine most popular?
Undine reached peak popularity in 1924, when 10 babies were given this name. The average age of a living person named Undine is approximately 108 years old, reflecting when the name was most commonly given.
How common was Undine in the 2020 Census?
The 2020 Census recorded 127 people with the first name Undine. That placed it at #49,173 in the published Census first-name tables, or 0.04 people per 100,000.
Why is the Census count different from the living estimate?
Because they measure different things. The Census number is a count of people with the name in 2020. The living estimate is a current model based on SSA birth records and survival rates, so it aims to estimate how many people with the name are alive now.
What does the SSA popularity chart show?
The popularity chart tracks birth registrations, not people currently alive. It shows how often Undine was given to babies from 1880 through 2024, which is why it is the best tool on the page for seeing long-run naming trends.
What does the Census say about the gender split for Undine?
In the 2020 Census snapshot, Undine was recorded as predominantly female. The published split was 2.4% male and 97.6% female.
What does the Census say about the background of people named Undine?
In the 2020 Census, the first name Undine was most commonly recorded among people who identified as White (55.74%). The next largest recorded groups were Black (35.25%) and Hispanic (4.92%). These percentages describe the people who had the name in the 2020 Census, not the deeper meaning or origin of the name itself.
Why can the Census sex total and race total differ slightly?
The Census published separate first-name tables for sex and for race and Hispanic origin. Those totals can differ slightly for the same name, so the page uses them as two related snapshots rather than treating them as perfectly interchangeable counts.
Does every first name have Census demographic data?
No. The public Census first-name tables only include names that met the Bureau's publication rules. That means some names on this site will have SSA history but no published Census demographic snapshot.
Is Undine a female name?
Undine is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
Why can Undine have a lot of living bearers even if it is not trendy now?
Because a name can build up a large population over many decades. Undine peaked in 1924, and the average living bearer is about 108 years old, so a name can still have millions of living bearers even after it stops feeling current for newborns.
How many Undine Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Undine Smith, Undine Johnson, Undine 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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