How Many People Are Named Zilphia?
An estimated 11 people in the United States have the first name Zilphia. It is almost exclusively a female name. The average bearer is 89 years old, and Zilphia peaked in popularity in 1920 with 16 births that year.
Below you will find a full statistical profile of Zilphia 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 Zilphia paired with any surname.
Key Insights
- With an average bearer age of 89, Zilphia is a vintage name most associated with earlier generations. Most living bearers were born before 1947.
- Zilphia is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
11
About 1 in 31,159,485 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
89
years old
Peak Year
1920
16 births
Total Registered
199
since 1880
Gender Distribution for Zilphia
Zilphia is almost exclusively a female name. Out of 199 total births registered, 100.0% were female.
Zilphia as a female name
Ranked #5,298 in 1950
6 female births in 1950
Peak: 1920 (16 births)
Zilphia: Popularity Over Time
SSA records for Zilphia span from the 1880s to the 1950s, covering 8 decades of naming data. The most popular decade for this name was the 1920s, when 80 babies were registered. Zilphia has declined significantly from its peak in the 1920s. Recent registrations are a fraction of what they were at the name's height.
Zilphia by Decade
How has Zilphia 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.
Zilphia by State
Zilphia + Last Name Combinations
How many people share a full name with Zilphia as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Zilphia
Other first names starting with Z with a similar number of bearers.
Zilphia: Questions and Answers
How many people in the U.S. are named Zilphia?
We estimate approximately 11 people named Zilphia 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 31,159,485 Americans share this first name.
Is Zilphia a common name?
Zilphia is classified as "Very Rare" and is more popular than 30.8% of all first names in the SSA database. A total of 199 births have been registered with this name since 1880.
When was Zilphia most popular?
Zilphia reached peak popularity in 1920, when 16 babies were given this name. The average age of a living person named Zilphia is approximately 89 years old, reflecting when the name was most commonly given.
What does the SSA popularity chart show?
The popularity chart tracks birth registrations, not people currently alive. It shows how often Zilphia 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.
Is Zilphia a female name?
Zilphia is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
Why can Zilphia 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. Zilphia peaked in 1920, and the average living bearer is about 89 years old, so a name can still have millions of living bearers even after it stops feeling current for newborns.
How many Zilphia Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Zilphia Smith, Zilphia Johnson, Zilphia 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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