How Many People Are Named Osa?
An estimated 78 people in the United States have the first name Osa. It is used for both genders, with 88.6% female. The average bearer is 50 years old, and Osa peaked in popularity in 1918 with 28 births that year.
Below you will find a full statistical profile of Osa 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 Osa paired with any surname.
Key Insights
- Osa is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
78
About 1 in 4,394,286 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
88.6% confidence
Average Age
50
years old
Peak Year
1918
28 births
Total Registered
760
since 1880
Gender Distribution for Osa
Osa is predominantly female (88.6%), though 87 male births have been registered. It functions as a unisex name for a small percentage of bearers.
Osa as a male name
Ranked #13,726 in 2017
5 male births in 2017
Peak: 1916 (10 births)
Osa as a female name
Ranked #17,013 in 2024
5 female births in 2024
Peak: 1892 (21 births)
Osa: Popularity Over Time
SSA records for Osa span from the 1880s to the 2020s, covering 11 decades of naming data. The most popular decade for this name was the 1920s, when 146 babies were registered. Osa has declined significantly from its peak in the 1920s. Recent registrations are a fraction of what they were at the name's height.
Osa by Decade
How has Osa 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.
Osa + Last Name Combinations
How many people share a full name with Osa as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Osa
Other first names starting with O with a similar number of bearers.
Osa: Questions and Answers
How many people in the U.S. are named Osa?
We estimate approximately 78 people named Osa 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 4,394,286 Americans share this first name.
Is Osa a common name?
Osa is classified as "Very Rare" and is more popular than 60.9% of all first names in the SSA database. A total of 760 births have been registered with this name since 1880.
When was Osa most popular?
Osa reached peak popularity in 1918, when 28 babies were given this name. The average age of a living person named Osa is approximately 50 years old, reflecting when the name was most commonly given.
Is Osa a female name?
Osa is predominantly female. 88.6% of people with this name are female. See the gender breakdown above for full details.
How many Osa Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Osa Smith, Osa Johnson, Osa 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 0 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau estimate. Full methodology.
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