How Many People Are Named Niilo?
An estimated 19 people in the United States have the first name Niilo. It is almost exclusively a male name. The average bearer is 9 years old, and Niilo peaked in popularity in 1916 with 7 births that year.
Below you will find a full statistical profile of Niilo 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 Niilo paired with any surname.
Key Insights
- Niilo is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
19
About 1 in 18,039,702 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
9
years old
Peak Year
1916
7 births
Total Registered
44
since 1880
Gender Distribution for Niilo
Niilo is almost exclusively a male name. Out of 44 total births registered, 100.0% were male.
Niilo as a male name
Ranked #10,469 in 2021
7 male births in 2021
Peak: 1916 (7 births)
Niilo: Popularity Over Time
SSA records for Niilo span from the 1910s to the 2020s, covering 3 decades of naming data. The most popular decade for this name was the 1910s, when 25 babies were registered. Niilo has declined significantly from its peak in the 1910s. Recent registrations are a fraction of what they were at the name's height.
Niilo by Decade
How has Niilo 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.
Niilo + Last Name Combinations
How many people share a full name with Niilo as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Niilo
Other first names starting with N with a similar number of bearers.
Niilo: Questions and Answers
How many people in the U.S. are named Niilo?
We estimate approximately 19 people named Niilo 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 18,039,702 Americans share this first name.
Is Niilo a common name?
Niilo is classified as "Very Rare" and is more popular than 39.1% of all first names in the SSA database. A total of 44 births have been registered with this name since 1880.
When was Niilo most popular?
Niilo reached peak popularity in 1916, when 7 babies were given this name. The average age of a living person named Niilo is approximately 9 years old, reflecting when the name was most commonly given.
Is Niilo a male name?
Niilo is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Niilo Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Niilo Smith, Niilo Johnson, Niilo 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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