2000
#98,770
National surname rank
Recorded bearers 170
First available Census row
Per 100,000 0.06
Very Rare Last name
Koomen
A Dutch locational surname derived from a village called Coomen.
According to the 2020 US Census Bureau surname tables, roughly 228 Americans carry the last name Koomen. That puts it at #97,730 in the national surname ranking, appearing at a frequency of 0.07 per 100,000 people (about 1 in 1,503,309 residents).
This page is the full Name Census profile for the Koomen surname. You will find the Census Bureau frequency data, a multi-census history view, an ancestry and ethnicity breakdown based on self-reported demographics, the name's meaning and origin where available, and answers to the most common questions people ask about this surname.
Bearers in the US
228
1 in 1,503,309
Census rank
#97,730
2020 decennial data
Per 100,000
0.1
Frequency rate
Recorded bearers
199
very rare in the US
Popularity narrative
The Census Bureau recorded 199 bearers of the surname Koomen in its 2020 decennial surname file. At a rate of 0.07 per 100,000 residents, it holds the 97730th position in the national surname ranking.
Among Census respondents with the surname Koomen, the largest self-reported group is White at 90.5%. The next largest groups are Two or More Races (5.0%) and Hispanic (3.0%).
Origin
Meaning and origin of Koomen
The surname KOOMEN is of Dutch origin, stemming from the medieval period in the Netherlands. It is believed to have its roots in the Dutch provinces of Zuid-Holland and Noord-Holland, specifically in the regions surrounding the cities of Rotterdam and Amsterdam.
One of the earliest known references to the name KOOMEN can be traced back to the 14th century, where it appeared as "Comen" in a Dutch census record from the city of Delft. This early spelling variation suggests a connection to the Dutch word "komen," which means "to come" or "to arrive."
During the 16th and 17th centuries, as Dutch explorers and colonists ventured across the globe, the surname KOOMEN began to spread to other parts of the world. Some of the earliest recorded instances of the name outside of the Netherlands include Johannes Koomen, a Dutch settler who arrived in Cape Town, South Africa, in 1688.
In the Netherlands itself, the name KOOMEN has been associated with various notable figures throughout history. One such individual was Dirk Koomen, a renowned 17th-century Dutch painter known for his still-life works featuring intricate arrangements of flowers and objects.
Another prominent bearer of the KOOMEN surname was Gerrit Koomen, a Dutch politician who served as a member of the States General (the Dutch parliament) in the late 18th century, playing a crucial role in shaping the country's policies during a period of significant political upheaval.
The name KOOMEN has also been linked to several place names in the Netherlands, particularly in the regions where it originated. For example, the village of Komenhuizen in the province of Noord-Holland is believed to have derived its name from the KOOMEN surname, suggesting a strong historical presence of the family in that area.
Other notable individuals with the KOOMEN surname include Jan Koomen, a 19th-century Dutch architect renowned for his contributions to the design of several prominent buildings in Amsterdam, and Hendrik Koomen, a 20th-century Dutch writer and poet whose works explored themes of identity, nationalism, and the human condition.
Throughout its long history, the surname KOOMEN has maintained a strong association with its Dutch origins, reflecting the rich cultural heritage and traditions of the Netherlands. While the name has since spread to various parts of the world, its roots remain firmly grounded in the landscapes and communities of the Low Countries.
Demographics
Ancestry and ethnicity for Koomen
Among Census respondents with the surname Koomen, the largest self-reported group is White at 90.5%. The next largest groups are Two or More Races (5.0%) and Hispanic (3.0%).
The bar chart below shows how Koomen bearers 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 surname, the Bureau suppresses the figure to protect individual privacy, which is why some names show fewer than six slices.
Percentages are shown for every Census year so the breakdown stays comparable over time. When the source file also includes raw headcounts, Name Census shows those alongside the percentages in the legend.
Keep in mind that these are self-reported numbers. A person's surname does not determine their race or ethnicity, and the distribution you see here reflects the specific population who happened to carry the Koomen surname at the time of the 2020 Census, not any inherent property of the name itself.
- White90.5% · 180
- Two or more races5.0% · 10
- Hispanic or Latino3.0% · 6
- Black or African American0.5% · 1
- Asian and Pacific Islander0.5% · 1
- American Indian and Alaska Native0.5% · 1
Timeline
Historical Census data for Koomen
Koomen appears in 3 published Census surname files: 2000, 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2010
#87,663
National surname rank
Recorded bearers 212
+42 bearers (+24.7%)
Per 100,000 0.07
Rank movement Up 11,107 places
2020
#97,730
National surname rank
Recorded bearers 199
-13 bearers (-6.1%)
Per 100,000 0.07
Rank movement Down 10,067 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #98,770 | 170 | 0.06 | First available Census row | First available Census row |
| 2010 | #87,663 | 212 | 0.07 | +42 bearers (+24.7%) | Up 11,107 places |
| 2020 | #97,730 | 199 | 0.07 | -13 bearers (-6.1%) | Down 10,067 places |
For 2020, the Census Bureau published race and Hispanic-origin columns as counts rather than percentages. Name Census converts those counts back into shares so the ancestry section stays comparable with the older surname files.
Year on year
2010 vs 2020 Census
How has the Koomen surname changed between Census years? The chart shows bearer count side by side, and the table compares rank, count, and frequency.
Census year comparison
20102020
| Metric | 2010 | 2020 | Change |
|---|---|---|---|
| Rank | #87,663 | #97,730 | -11.5% |
| Count | 212 | 199 | -6.1% |
| Per 100K | 0.07 | 0.07 | -4.9% |
Between the 2010 and 2020 Census, the number of Koomen bearers went from 212 to 199 (-6.1% change). The surname moved down 10,067 positions in the national ranking, going from #87,663 to #97,730.
FAQ
Koomen surname: questions and answers
How many people in the U.S. have the surname Koomen?
Name Census estimates that about 228 living Americans carry the surname Koomen. Using the current population baseline, that works out to roughly 1 in 1,503,309 residents.
How common is Koomen?
Koomen ranks #97,730 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.07 per 100,000 residents, which is about 0 people out of every 100,000.
How many people with this surname were counted in the Census?
The raw 2020 Census file counted 199 people with the surname Koomen. That is different from the site's living-bearer estimate (228), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.07 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.07 per 100,000 means that if you picked a random group of 100,000 U.S. residents, you would expect about 0 of them to have the surname Koomen.
Has Koomen become more or less common over time?
Between 2010 and 2020, the surname Koomen went from 212 recorded bearers to 199. That is a decrease of 13 (-6.1%). In the national ranking it fell from #87,663 to #97,730.
What does the Census say about the background of Koomen?
Among Census respondents with the surname Koomen, the largest self-reported group is White at 90.5%. The next largest groups are Two or More Races (5.0%) and Hispanic (3.0%). These figures come from the 2020 Census Bureau surname tables, based on how respondents described their own race and ethnicity.
Which group reports this surname most often?
White is the largest self-reported group for the surname Koomen in the 2020 Census, accounting for 90.5% (180 people in the source table).
What is the full ancestry breakdown?
Koomen appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (90.5%), Two or More Races (5.0%), Hispanic (3.0%). For 2020, the source file also published raw headcounts for each group, which is why this page can show both percentages and counts in the ancestry section.
Is this page using the latest Census data?
Yes. This page is using the latest surname file currently loaded on Name Census, which is 2020. The historical section above also keeps any older Census surname entries we have for Koomen (2000, 2010, 2020).
Does the Census include every surname?
No. The Census Bureau only publishes surnames that appeared at least 100 times in a given decennial Census. That means very rare surnames are excluded entirely, and a surname can appear in one Census release but disappear from a later one if it falls below the reporting threshold.
Why don't the ancestry percentages always add up to exactly 100%?
There are two main reasons: rounding and suppression. The Census Bureau rounds published values, and it may suppress very small cells to protect privacy. For 2020, the Bureau also published raw group counts rather than direct percentages, so Name Census converts those counts back into shares for comparability across census years.
What does Koomen mean?
A Dutch locational surname derived from a village called Coomen. The fuller origin note on this page goes into more detail.
Where does the surname data come from?
All surname statistics on Name Census are drawn from the US Census Bureau's decennial surname frequency tables. These files list every surname that appeared 100 or more times in the 2020 Census, along with a count, a per-100,000 rate, and a self-reported demographic breakdown. You can read the full explanation on our methodology page.
How does Name Census estimate living bearers?
For surnames, Name Census does not age cohorts the way it does for first names. Instead, it takes the Census Bureau's published frequency for Koomen (0.07 per 100,000) and applies that rate to the current U.S. resident population to estimate how many living Americans have the surname today.
How many people are called Koomen?
See how many people have the surname Koomen on HowManyOfMe.org, our sister site built around that single question.