Unknown
Of uncertain or anonymous origin, identity, or authorship.
Name Census estimates that about 14,649 living Americans carry the first name Unknown. It appears on both sides of the gender split, with 50.1% of registrations being male. The average person named Unknown today is around 53 years old, and the year with the single highest number of Unknown births was 1954 (1,193 babies).
This page is the full Name Census profile for Unknown. 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
- • Unknown sits in rare territory as a truly gender-neutral name, given to boys and girls in near-equal numbers.
People living today
15K
~ 1 in 23,398 Americans
Peak year
1954
1,193 babies that year
Average age
53
years old
2024 SSA rank
#3,199
Tracked since 1880
Gender
Gender distribution for Unknown
Unknown is one of the more evenly split names in the SSA data. Of the 19,602 total registrations, 9,827 (50.1%) were male and 9,775 (49.9%) were female.
Unknown as a male name
- Ranked #3,199 in 2024
- 38 male births in 2024
- Peak: 1954 (549 births)
Unknown as a female name
- Ranked #4,021 in 2024
- 37 female births in 2024
- Peak: 1954 (644 births)
Popularity
Unknown: popularity over time
The SSA tracks Unknown from the 1880s through to the 2020s, spanning 15 decades of birth certificate data. The biggest single decade for the name was the 1950s, with 8,929 total registrations. Usage has dropped considerably from its 1950s peak. The most recent decade brought in only a fraction of the registrations that the name once attracted.
Babies born per year
Decades
Unknown 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 Unknown during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
Geography
Where Unknowns live
The SSA's state-level files cover 36 states and territories. Georgia, Alabama, Oregon recorded the most babies named Unknown, while Idaho, Utah, New Mexico recorded the fewest. The average across all reporting states is about 415 registrations each.
Origin
Meaning and history of Unknown
The name Unknown is a fairly modern moniker that emerged in the 20th century as a placeholder for individuals whose identities were not known or not recorded. Its linguistic roots can be traced back to the Old English word "uncunnan," which means "not to know" or "to be ignorant of."
While the name itself does not have a deep historical legacy, its usage became prevalent in official records, particularly in law enforcement, medical, and government documentation, to refer to unnamed or unidentified individuals. The earliest known examples of the name's usage can be found in police reports and coroner's files from the early 1900s.
One of the earliest documented cases of an individual being referred to as Unknown dates back to 1904, when an unidentified woman's body was discovered in a river in London, England. The case, which became known as the "Unknown Woman of the Seine," remained unsolved, and the victim's identity was never established.
Throughout the 20th century, the name Unknown gained notoriety in high-profile cases involving unidentified victims or missing persons. One such case was the "Unknown Child of the Sahara," a young boy whose mummified remains were discovered in the Sahara Desert in 1976. Despite extensive efforts, his identity remained a mystery.
Another notable example is the "Unknown Soldier," a symbolic figure representing the countless soldiers who died in battle without being identified. Many countries have erected memorials and tombs dedicated to the Unknown Soldier, with the first such monument being erected in Westminster Abbey, London, in 1920 to honor the fallen of World War I.
While the name Unknown is not traditionally associated with specific individuals, there have been a few instances where it has been used as a legal name. In 1971, a man in Australia legally changed his name to "Unknown Sailor" as a form of protest against the Vietnam War. Similarly, in 1994, a woman in the United States legally changed her name to "Unknown Citizen" to highlight the plight of homeless individuals.
Overall, the name Unknown serves as a poignant reminder of the many individuals throughout history whose identities have been lost or obscured, but whose stories and struggles continue to shape our understanding of the human experience.
People
Unknown + last name combinations
How many people share a full name with Unknown as the first name? Click a combination below to see the estimate, or search any pairing.
Related
Other names starting with U
Other first names starting with U with a similar number of bearers.
FAQ
Unknown: questions and answers
How many people in the U.S. are named Unknown?
Name Census puts the figure at roughly 14,649 living Americans. We arrive at this by taking every SSA birth registration for Unknown 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 23,398 US residents.
Is Unknown a common name?
We classify Unknown as "Uncommon". It ranks above 98.2% of all first names in the SSA dataset by living bearers. Across the full history of the data, 19,602 babies have been registered with this name.
When was Unknown most popular?
The single biggest year for Unknown was 1954, when 1,193 babies received the name. The fact that the average living Unknown is about 53 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
Is Unknown a male name?
Yes, 50.1% of people registered as Unknown in the SSA data are male. 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.
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.