How Many People Are Named Onnie?
An estimated 404 people in the United States have the first name Onnie. It is used for both genders, with 62.2% female. The average bearer is 72 years old, and Onnie peaked in popularity in 1915 with 56 births that year.
Below you will find a full statistical profile of Onnie 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 Onnie paired with any surname.
Key Insights
- Onnie is a genuinely unisex name, given to both boys and girls in roughly equal numbers.
- With an average bearer age of 72, Onnie is a vintage name most associated with earlier generations. Most living bearers were born before 1964.
Estimated Living Americans
404
About 1 in 848,402 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
62.2% confidence
Average Age
72
years old
Peak Year
1915
56 births
Total Registered
1,736
since 1880
Gender Distribution for Onnie
Onnie is a genuinely unisex name, used for both males (37.8%) and females (62.2%). Out of 1,736 total births registered, 657 were male and 1,079 were female.
Onnie as a male name
Ranked #8,179 in 1988
5 male births in 1988
Peak: 1915 (26 births)
Onnie as a female name
Ranked #16,984 in 2023
5 female births in 2023
Peak: 1922 (33 births)
Onnie: Popularity Over Time
SSA records for Onnie span from the 1880s to the 2020s, covering 13 decades of naming data. The most popular decade for this name was the 1920s, when 401 babies were registered. Onnie has declined significantly from its peak in the 1920s. Recent registrations are a fraction of what they were at the name's height.
Onnie by Decade
How has Onnie 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.
Onnie by State
Birth registrations for Onnie span all 8 states and territories in the SSA database. The highest counts are in North Carolina, Georgia, Mississippi. The lowest are in Tennessee, New York, Michigan. On average, about 28 Onnies were registered per state.
Onnie + Last Name Combinations
How many people share a full name with Onnie as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Onnie
Other first names starting with O with a similar number of bearers.
Onnie: Questions and Answers
How many people in the U.S. are named Onnie?
We estimate approximately 404 people named Onnie 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 848,402 Americans share this first name.
Is Onnie a common name?
Onnie is classified as "Very Rare" and is more popular than 82.4% of all first names in the SSA database. A total of 1,736 births have been registered with this name since 1880.
When was Onnie most popular?
Onnie reached peak popularity in 1915, when 56 babies were given this name. The average age of a living person named Onnie is approximately 72 years old, reflecting when the name was most commonly given.
Is Onnie a female name?
Onnie is predominantly female. 62.2% of people with this name are female. See the gender breakdown above for full details.
How many Onnie Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Onnie Smith, Onnie Johnson, Onnie 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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