How Many People Are Named Onna?
An estimated 598 people in the United States have the first name Onna. It is almost exclusively a female name. The average bearer is 28 years old, and Onna peaked in popularity in 2015 with 33 births that year.
Below you will find a full statistical profile of Onna 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 Onna paired with any surname.
Estimated Living Americans
598
About 1 in 573,168 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
28
years old
Peak Year
2015
33 births
Total Registered
643
since 1880
Gender Distribution for Onna
Onna is almost exclusively a female name. Out of 643 total births registered, 100.0% were female.
Onna as a female name
Ranked #14,792 in 2024
6 female births in 2024
Peak: 2015 (33 births)
Onna: Popularity Over Time
SSA records for Onna span from the 1920s to the 2020s, covering 10 decades of naming data. The most popular decade for this name was the 2010s, when 165 babies were registered. While Onna is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Onna by Decade
How has Onna 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.
Onna + Last Name Combinations
How many people share a full name with Onna as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Onna
Other first names starting with O with a similar number of bearers.
Onna: Questions and Answers
How many people in the U.S. are named Onna?
We estimate approximately 598 people named Onna 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 573,168 Americans share this first name.
Is Onna a common name?
Onna is classified as "Very Rare" and is more popular than 86.2% of all first names in the SSA database. A total of 643 births have been registered with this name since 1880.
When was Onna most popular?
Onna reached peak popularity in 2015, when 33 babies were given this name. The average age of a living person named Onna is approximately 28 years old, reflecting when the name was most commonly given.
Is Onna a female name?
Onna is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Onna Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Onna Smith, Onna Johnson, Onna 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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