How Many People Are Named Onslow?
An estimated 0 people in the United States have the first name Onslow. It is almost exclusively a male name. The average bearer is 0 years old, and Onslow peaked in popularity in 1917 with 7 births that year.
Below you will find a full statistical profile of Onslow 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 Onslow paired with any surname.
Key Insights
- Onslow is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
0
About 1 in 1 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
0
years old
Peak Year
1917
7 births
Total Registered
7
since 1880
Gender Distribution for Onslow
Onslow is almost exclusively a male name. Out of 7 total births registered, 100.0% were male.
Onslow as a male name
Ranked #3,465 in 1917
7 male births in 1917
Peak: 1917 (7 births)
Onslow: Popularity Over Time
Onslow by Decade
How has Onslow 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.
| Decade | Total | Male | Female | |
|---|---|---|---|---|
| 1910s | 7 | 7 | 0 | |
Onslow + Last Name Combinations
How many people share a full name with Onslow as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Onslow
Other first names starting with O with a similar number of bearers.
Onslow: Questions and Answers
How many people in the U.S. are named Onslow?
We estimate approximately 0 people named Onslow 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 1 Americans share this first name.
Is Onslow a common name?
Onslow is classified as "Very Rare" and is more popular than 2.9% of all first names in the SSA database. A total of 7 births have been registered with this name since 1880.
When was Onslow most popular?
Onslow reached peak popularity in 1917, when 7 babies were given this name. The average age of a living person named Onslow is approximately 0 years old, reflecting when the name was most commonly given.
Is Onslow a male name?
Onslow is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Onslow Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Onslow Smith, Onslow Johnson, Onslow 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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