2000
#116,835
National surname rank
Recorded bearers 138
First available Census row
Per 100,000 0.05
Very Rare Last name
Kloskowski
A Polish surname derived from a diminutive of the term for a carpenter or woodworker.
According to the 2020 US Census Bureau surname tables, roughly 127 Americans carry the last name Kloskowski. That puts it at #148,665 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,698,853 residents).
This page is the full Name Census profile for the Kloskowski 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
127
1 in 2,698,853
Census rank
#148,665
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
111
very rare in the US
Popularity narrative
The Census Bureau recorded 111 bearers of the surname Kloskowski in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 148665th position in the national surname ranking.
Among Census respondents with the surname Kloskowski, the largest self-reported group is White at 97.3%. The next largest groups are Two or More Races (1.8%) and Black (0.9%).
Origin
Meaning and origin of Kloskowski
The surname Kloskowski originates from Poland and is derived from the Polish words "klos" meaning an ear of grain, and the suffix "-owski" which is a common Polish surname suffix indicating a possessive form or origin. This suggests the name likely originated as a descriptive name for someone who worked with grain or lived in an area known for grain cultivation.
The earliest recorded instances of the Kloskowski surname date back to the 16th century in historical records from the Polish regions of Wielkopolska and Mazowsze. It is believed the name may have originated in these areas or nearby regions where grain farming was prevalent.
One of the first documented mentions of the Kloskowski name was in a 1564 land registry from the town of Kościan in the Wielkopolska region, referring to a landowner named Jan Kloskowski. The name also appeared in records from the nearby town of Środa Wielkopolska around the same time period.
Another early reference to the Kloskowski surname can be found in a 1587 baptismal record from the parish church in Łowicz, a town in the Mazowsze region, where a child named Katarzyna Kloskowska was christened. The feminine form "Kloskowska" indicates the name was well-established in the area by that point.
One notable historical figure with the Kloskowski surname was Jakub Kloskowski (1554-1612), a Polish nobleman and military commander who served under King Sigismund III Vasa during the Polish-Swedish War. He was known for his victories against Swedish forces in the Battle of Kirchholm in 1605.
Another individual of note was Franciszek Kloskowski (1675-1741), a Polish Catholic priest and philosopher who authored several theological works in the early 18th century, including a treatise on the nature of the soul titled "De Anima" published in 1723.
In the 19th century, Karol Kloskowski (1808-1871) was a prominent Polish lawyer and judge who served as the President of the Supreme Court in the Congress Kingdom of Poland from 1860 until his death.
Additionally, Antoni Kloskowski (1866-1932) was a respected Polish painter and art professor who helped establish the Art Nouveau movement in Poland through his innovative works and teachings at the Academy of Fine Arts in Krakow.
While the origins of the Kloskowski surname can be traced back to 16th century Poland, it eventually spread to other regions as Polish communities migrated, with examples of the name appearing in historical records from neighboring countries such as Lithuania, Belarus, and Ukraine over the centuries.
Demographics
Ancestry and ethnicity for Kloskowski
Among Census respondents with the surname Kloskowski, the largest self-reported group is White at 97.3%. The next largest groups are Two or More Races (1.8%) and Black (0.9%).
The bar chart below shows how Kloskowski 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 Kloskowski surname at the time of the 2020 Census, not any inherent property of the name itself.
- White97.3% · 108
- Two or more races1.8% · 2
- Black or African American0.9% · 1
Timeline
Historical Census data for Kloskowski
Kloskowski 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
#118,853
National surname rank
Recorded bearers 146
+8 bearers (+5.8%)
Per 100,000 0.05
Rank movement Down 2,018 places
2020
#148,665
National surname rank
Recorded bearers 111
-35 bearers (-24.0%)
Per 100,000 0.04
Rank movement Down 29,812 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #116,835 | 138 | 0.05 | First available Census row | First available Census row |
| 2010 | #118,853 | 146 | 0.05 | +8 bearers (+5.8%) | Down 2,018 places |
| 2020 | #148,665 | 111 | 0.04 | -35 bearers (-24.0%) | Down 29,812 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 Kloskowski 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 | #118,853 | #148,665 | -25.1% |
| Count | 146 | 111 | -24.0% |
| Per 100K | 0.05 | 0.04 | -25.7% |
Between the 2010 and 2020 Census, the number of Kloskowski bearers went from 146 to 111 (-24.0% change). The surname moved down 29,812 positions in the national ranking, going from #118,853 to #148,665.
FAQ
Kloskowski surname: questions and answers
How many people in the U.S. have the surname Kloskowski?
Name Census estimates that about 127 living Americans carry the surname Kloskowski. Using the current population baseline, that works out to roughly 1 in 2,698,853 residents.
How common is Kloskowski?
Kloskowski ranks #148,665 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.04 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 111 people with the surname Kloskowski. That is different from the site's living-bearer estimate (127), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.04 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.04 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 Kloskowski.
Has Kloskowski become more or less common over time?
Between 2010 and 2020, the surname Kloskowski went from 146 recorded bearers to 111. That is a decrease of 35 (-24.0%). In the national ranking it fell from #118,853 to #148,665.
What does the Census say about the background of Kloskowski?
Among Census respondents with the surname Kloskowski, the largest self-reported group is White at 97.3%. The next largest groups are Two or More Races (1.8%) and Black (0.9%). 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 Kloskowski in the 2020 Census, accounting for 97.3% (108 people in the source table).
What is the full ancestry breakdown?
Kloskowski appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (97.3%), Two or More Races (1.8%), Black (0.9%). 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 Kloskowski (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 Kloskowski mean?
A Polish surname derived from a diminutive of the term for a carpenter or woodworker. 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 Kloskowski (0.04 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 have the last name Kloskowski?
You can see how common the surname Kloskowski is on our sister site HowManyOfMe.org — same data roots, lighter UI.