Ninja
Historically derived from the Japanese word "ninzu", meaning vigilant or persevering.
Name Census estimates that about 18 living Americans carry the first name Ninja. The name is used almost exclusively for girls. The average person named Ninja today is around 42 years old, and the year with the single highest number of Ninja births was 1983 (8 babies).
This page is the full Name Census profile for Ninja. Below you will find a gender breakdown showing how the name splits between male and female registrations, a year-by-year popularity chart stretching back to 1880, decade-level totals, the top US states for this name, its meaning and etymology, and a set of frequently asked questions with data-backed answers.
Key insights
- • Fewer than 100 living Americans are believed to carry the name Ninja. It is among the rarest names in the SSA records.
People living today
18
~ 1 in 19,041,908 Americans
Peak year
1983
8 babies that year
Average age
42
years old
1985 SSA rank
#10,244
Tracked since 1983
Popularity
Ninja: popularity over time
Babies born per year
Decades
Ninja by decade
The table below breaks the full SSA timeline into ten-year windows. Each row shows how many male and female babies were given the name Ninja during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
| Decade | Male | Female | Total |
|---|---|---|---|
| 1980s | 0 | 19 | 19 |
Origin
Meaning and history of Ninja
The name Ninja is not an actual given name, but rather a term used to describe a type of covert agent or mercenary in feudal Japan. The word "ninja" comes from the Japanese characters "nin" meaning "perseverance" and "ja" meaning "person." Together, it refers to someone who endures or perseveres in challenging circumstances.
The origins of the ninja can be traced back to the 15th century in Japan, during the Sengoku period of civil wars and political turmoil. Ninja were skilled in various forms of combat, espionage, and sabotage, and were often employed by feudal lords or samurai clans for covert operations.
While ninja are often depicted in popular culture as stealthy assassins in black outfits, their historical role was more complex. They served as scouts, spies, and messengers, and were experts in disguise, infiltration, and the use of unconventional weapons and tactics.
Some notable historical figures associated with the ninja tradition include Hattori Hanzo, a famous 16th-century ninja who served under Tokugawa Ieyasu, and Fujibayashi Nagato, a ninja who played a crucial role in the Battle of Okehazama in 1560.
Other famous ninja throughout history include Yamamoto Kansuke, a 16th-century ninja who was known for his skill in disguise and infiltration, and Ishikawa Goemon, a legendary outlaw and ninja who lived in the 16th century and was known for his daring exploits.
Although the heyday of the ninja ended with the rise of the Tokugawa Shogunate in the 17th century, the legacy of the ninja has endured in popular culture and folklore. The image of the stealthy, skilled warrior has captured the imagination of people around the world, and has been the subject of countless books, movies, and video games.
People
Ninja + last name combinations
How many people share a full name with Ninja as the first name? Click a combination below to see the estimate, or search any pairing.
Related
Other names starting with N
Other first names starting with N with a similar number of bearers.
FAQ
Ninja: questions and answers
How many people in the U.S. are named Ninja?
Name Census puts the figure at roughly 18 living Americans. We arrive at this by taking every SSA birth registration for Ninja going back to 1880 and adjusting each cohort for expected survival using CDC actuarial life tables. The result is an age-weighted living-bearer count, not a raw birth total. That works out to about 1 in 19,041,908 US residents.
Is Ninja a common name?
We classify Ninja as "Very Rare". It ranks above 38.4% of all first names in the SSA dataset by living bearers. Across the full history of the data, 19 babies have been registered with this name.
When was Ninja most popular?
The single biggest year for Ninja was 1983, when 8 babies received the name. The fact that the average living Ninja is about 42 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
What does the SSA popularity chart show?
The chart tracks births, not the number of people alive with the name today. Each point shows how many babies were given the name Ninja in that year. That makes it useful for spotting when the name rose, peaked, or faded.
Is Ninja a female name?
Yes, 100.0% of people registered as Ninja in the SSA data are female. You can see the full per-sex comparison in the gender distribution section above, which includes the latest year rank, birth count, and peak year for each sex.
Is Ninja still being used today?
Yes. The SSA still recorded Ninja in 2024, and the page above shows its latest-year rank where available. A name can be well past its peak and still remain in steady use, especially if it built up a large population over earlier decades.
Why can a name have a lot of living bearers even if it is not trendy now?
Because living-bearer counts and current baby-name popularity measure different things. A name like Ninja can build up a very large population over many decades, even if fewer parents are choosing it now than they did at its peak.
Where does this data come from?
First-name figures come from the Social Security Administration's national baby name files, which cover every name on a birth certificate from 1880 to 2024. Living-bearer estimates layer in CDC actuarial life tables broken out by sex to account for mortality. The population baseline (342,754,338) is the Census Bureau's latest national estimate. You can read the full calculation on our methodology page.
Does every first name have Census demographic data?
No. The public Census first-name release only covers names that met the Bureau's publication rules, so many rarer names in the SSA files do not have a published Census demographic snapshot. In those cases, the page still shows the SSA trend, gender history, and state data.
How many people have the name Ninja?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.