How Many People Are Named Onelia?
An estimated 31 people in the United States have the first name Onelia. It is almost exclusively a female name. The average bearer is 41 years old, and Onelia peaked in popularity in 1916 with 12 births that year.
Below you will find a full statistical profile of Onelia 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 Onelia paired with any surname.
Key Insights
- Onelia is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
31
About 1 in 11,056,592 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
41
years old
Peak Year
1916
12 births
Total Registered
139
since 1880
Gender Distribution for Onelia
Onelia is almost exclusively a female name. Out of 139 total births registered, 100.0% were female.
Onelia as a female name
Ranked #17,133 in 2022
5 female births in 2022
Peak: 1916 (12 births)
Onelia: Popularity Over Time
SSA records for Onelia span from the 1890s to the 2020s, covering 9 decades of naming data. The most popular decade for this name was the 1910s, when 47 babies were registered. Onelia has declined significantly from its peak in the 1910s. Recent registrations are a fraction of what they were at the name's height.
Onelia by Decade
How has Onelia 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.
Onelia by State
Onelia + Last Name Combinations
How many people share a full name with Onelia as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Onelia
Other first names starting with O with a similar number of bearers.
Onelia: Questions and Answers
How many people in the U.S. are named Onelia?
We estimate approximately 31 people named Onelia 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 11,056,592 Americans share this first name.
Is Onelia a common name?
Onelia is classified as "Very Rare" and is more popular than 47% of all first names in the SSA database. A total of 139 births have been registered with this name since 1880.
When was Onelia most popular?
Onelia reached peak popularity in 1916, when 12 babies were given this name. The average age of a living person named Onelia is approximately 41 years old, reflecting when the name was most commonly given.
Is Onelia a female name?
Onelia is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Onelia Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Onelia Smith, Onelia Johnson, Onelia 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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