Sejin
A Korean name meaning "virtuous person".
Name Census estimates that about 6 living Americans carry the first name Sejin. The name is used almost exclusively for boys. The average person named Sejin today is around 25 years old, and the year with the single highest number of Sejin births was 2001 (6 babies).
This page is the full Name Census profile for Sejin. 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 Sejin. It is among the rarest names in the SSA records.
People living today
6
~ 1 in 57,125,723 Americans
Peak year
2001
6 babies that year
Average age
25
years old
2001 SSA rank
#10,336
Tracked since 2001
Census
Sejin in the 2020 Census
The 2020 Census recorded 318 people with the first name Sejin, which placed it at #28,322 in the published first-name tables. This is a snapshot of people who already had the name at the time of the Census.
The SSA sections elsewhere on this page answer a different question: how often parents gave the name to babies over time. The "people living today" figure on this page is different again: it is a current estimate built from SSA birth records and age-based survival rates, so the two numbers are not expected to match exactly.
2020 Census rank
#28,322
National first-name rank
People counted
318
318 in the published race/origin table
Per 100,000
0.1
People with this name in 2020
Largest reported group
Asian and Pacific Islander
95.0% of people with this name
Demographics
Ancestry and ethnicity for Sejin
In the 2020 Census race and Hispanic-origin table, the largest reported group for people named Sejin is Asian/Pacific Islander at 95.0%. The next largest groups are White (2.5%) and Two or More Races (1.6%). These figures describe the people who had the name in 2020, not any inherent property of the name itself.
The bar chart below shows how people with the first name Sejin described their own race and ethnicity on the 2020 Census form. The Census Bureau groups responses into six broad categories: White, Black or African American, Hispanic or Latino, Asian and Pacific Islander, American Indian and Alaska Native, and Two or More Races. When a category has too few respondents for a given name, the Bureau suppresses the figure to protect individual privacy, which is why some names show fewer than six slices.
Percentages are shown so the breakdown is easy to read across every published category. Because the 2020 Census first-name file also includes raw headcounts for each group, Name Census can show those alongside the percentages in the legend and hover tooltip.
Keep in mind that these are self-reported numbers. A first name does not determine a person's race or ethnicity, and the distribution you see here reflects the specific population who happened to carry the name Sejin at the time of the 2020 Census, not any inherent property of the name itself.
- Asian and Pacific Islander95.0% · 302
- White2.5% · 8
- Two or more races1.6% · 5
- Black or African American0.6% · 2
- Hispanic or Latino0.3% · 1
Popularity
Sejin: popularity over time
Babies born per year
Decades
Sejin 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 Sejin during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
| Decade | Male | Female | Total |
|---|---|---|---|
| 2000s | 6 | 0 | 6 |
Origin
Meaning and history of Sejin
The name Sejin is a Korean given name of relatively recent origin, likely emerging within the past few centuries. It is composed of two distinct elements: "se," which means "world" or "universe," and "jin," meaning "person" or "human." Together, these two syllables create a name that can be interpreted as "a person of the world" or "a worldly person."
While the precise origins of the name are uncertain, it is believed to have been inspired by the desire to bestow upon a child a sense of global awareness and connection to the broader human experience. In a culture deeply rooted in tradition and values, the name Sejin may have been chosen to encourage a more expansive worldview and curiosity about the world beyond one's immediate surroundings.
Historically, there are few notable figures recorded with the name Sejin, as its usage appears to be a relatively modern phenomenon. However, a few individuals have gained recognition in recent centuries.
One of the earliest recorded examples of the name Sejin is that of Sejin Choi (1870-1946), a Korean calligrapher and artist celebrated for his mastery of traditional East Asian ink painting techniques. His works, which often depicted landscapes and natural scenes, are highly regarded for their technical proficiency and ability to evoke a sense of tranquility and harmony with nature.
Another notable figure was Sejin Kim (1910-1983), a Korean poet and literary critic who played a significant role in the development of modern Korean literature. His poetry explored themes of identity, cultural traditions, and the human condition, and his critical works helped to shape the understanding and appreciation of Korean literary works.
In more recent times, Sejin Park (born 1957) has gained recognition as a South Korean architect and urban planner. His works, which include notable projects in Seoul and other major cities, are known for their innovative designs that seamlessly blend modern aesthetics with traditional Korean architectural elements.
Sejin Choi (born 1985) is a contemporary South Korean artist whose multidisciplinary practice encompasses installation, sculpture, and performance art. Her works often explore themes of identity, cultural hybridity, and the relationship between the individual and the collective, reflecting the global perspective that her name suggests.
Finally, Sejin Yoon (born 1988) is a South Korean professional golfer who has achieved success on various international tours, including the LPGA Tour. Her athletic accomplishments and dedication to her sport have made her a notable figure in the world of professional golf.
While the name Sejin may be relatively new in the grand scheme of human history, its meaning and the individuals who have carried it embody a spirit of global awareness, cultural exchange, and a desire to make a lasting impact on the world around them.
People
Sejin + last name combinations
How many people share a full name with Sejin as the first name? Click a combination below to see the estimate, or search any pairing.
Related
Other names starting with S
Other first names starting with S with a similar number of bearers.
FAQ
Sejin: questions and answers
How many people in the U.S. are named Sejin?
Name Census puts the figure at roughly 6 living Americans. We arrive at this by taking every SSA birth registration for Sejin 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 57,125,723 US residents.
Is Sejin a common name?
We classify Sejin as "Very Rare". It ranks above 22.3% of all first names in the SSA dataset by living bearers. Across the full history of the data, 6 babies have been registered with this name.
When was Sejin most popular?
The single biggest year for Sejin was 2001, when 6 babies received the name. The fact that the average living Sejin is about 25 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
How common was Sejin in the 2020 Census?
The published 2020 Census first-name tables recorded 318 people with the name Sejin, or 0.11 per 100,000 residents. That placed it at #28,322 in the national Census ranking for first names.
Why is the Census count different from the living estimate?
Because they measure different things. The Census figure is a count of people who had the name Sejin in 2020. The living estimate aims to answer a current question instead: how many people with the name are alive today, based on SSA birth records and age-based survival rates. Since one number is a 2020 snapshot and the other is a present-day estimate, they are not expected to be identical.
What does the Census say about the gender split for Sejin?
The 2020 Census sex table shows Sejin on both sides of the split. Of the 315 people counted with this name, 156 were male (49.5%) and 159 were female (50.5%). The Census view is a snapshot of people living with the name in 2020, while the SSA section above tracks births across time.
What does the Census say about the background of people named Sejin?
In the 2020 Census race and Hispanic-origin table, the largest reported group for people named Sejin is Asian/Pacific Islander at 95.0%. The next largest groups are White (2.5%) and Two or More Races (1.6%). These figures describe the people who had the name in 2020, not any inherent property of the name itself. The percentages in the chart above come from self-reported race and Hispanic-origin responses in the 2020 Census.
Which group reports the name Sejin most often in the Census?
Asian/Pacific Islander is the largest reported group for people named Sejin in the 2020 Census, accounting for 95.0% (302 people in the published table).
Why can the Census sex total and race total differ slightly?
The Census Bureau published separate 2020 tables for sex and for race/Hispanic origin, and the released figures can differ slightly because of privacy protection in the public files. That is why this page treats the gender section and the race/origin section as two related snapshots instead of forcing them into one identical total.
Does every first name have Census demographic data?
No. The public Census first-name release only includes names that met the Bureau's publication rules, so many rarer names in the SSA files have no Census demographic snapshot. When that happens, the SSA trend, gender history, and state sections still appear, but the 2020 Census demographic sections are omitted.
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 Sejin in that year. That makes it useful for spotting when the name rose, peaked, or faded.
Is Sejin a male name?
Yes, 100.0% of people registered as Sejin 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.
Is Sejin still being used today?
Yes. The SSA still recorded Sejin 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 Sejin 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.
How many people are called Sejin?
You can see how many people share the name Sejin on our sister site HowManyOfMe.org — same data roots, lighter UI.