How Many People Are Named Onetha?
An estimated 27 people in the United States have the first name Onetha. It is almost exclusively a female name. The average bearer is 77 years old, and Onetha peaked in popularity in 1949 with 9 births that year.
Below you will find a full statistical profile of Onetha 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 Onetha paired with any surname.
Key Insights
- With an average bearer age of 77, Onetha is a vintage name most associated with earlier generations. Most living bearers were born before 1959.
- Onetha is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
27
About 1 in 12,694,605 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
77
years old
Peak Year
1949
9 births
Total Registered
79
since 1880
Gender Distribution for Onetha
Onetha is almost exclusively a female name. Out of 79 total births registered, 100.0% were female.
Onetha as a female name
Ranked #5,413 in 1959
7 female births in 1959
Peak: 1949 (9 births)
Onetha: Popularity Over Time
SSA records for Onetha span from the 1920s to the 1950s, covering 4 decades of naming data. The most popular decade for this name was the 1940s, when 26 babies were registered. While Onetha is less common than at its peak in the 1940s, it remains a well-established name with steady registrations.
Onetha by Decade
How has Onetha 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.
Onetha + Last Name Combinations
How many people share a full name with Onetha as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Onetha
Other first names starting with O with a similar number of bearers.
Onetha: Questions and Answers
How many people in the U.S. are named Onetha?
We estimate approximately 27 people named Onetha 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 12,694,605 Americans share this first name.
Is Onetha a common name?
Onetha is classified as "Very Rare" and is more popular than 44.9% of all first names in the SSA database. A total of 79 births have been registered with this name since 1880.
When was Onetha most popular?
Onetha reached peak popularity in 1949, when 9 babies were given this name. The average age of a living person named Onetha is approximately 77 years old, reflecting when the name was most commonly given.
Is Onetha a female name?
Onetha is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Onetha Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Onetha Smith, Onetha Johnson, Onetha 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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