2000
#134,929
National surname rank
Recorded bearers 115
First available Census row
Per 100,000 0.04
Very Rare Last name
Kopydlowski
A surname of Polish origin derived from the words "kopyto" (hoof) and "lowski" (related to), likely referring to an occupational connection to horses or farriers.
According to the 2020 US Census Bureau surname tables, roughly 127 Americans carry the last name Kopydlowski. 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 Kopydlowski 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 Kopydlowski 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 Kopydlowski, the largest self-reported group is White at 97.3%. The next largest groups are Two or More Races (1.8%) and Hispanic (0.9%).
Origin
Meaning and origin of Kopydlowski
The surname KOPYDLOWSKI is of Polish origin, originating in the 16th century. It is derived from the Polish words "kopyto," meaning "hoof," and the suffix "-owski," which indicates a place of origin. This suggests that the name may have referred to someone who lived near a place associated with horses or blacksmiths.
The earliest known record of the name KOPYDLOWSKI appears in the 1587 tax registers of the town of Krakow, where a certain Jan KOPYDLOWSKI is listed as a blacksmith. This indicates that the name was likely already well-established by that time.
In the 17th century, the KOPYDLOWSKI name can be found in various records from the Lublin region of eastern Poland. One notable figure was Marcin KOPYDLOWSKI, a prominent landowner and member of the local nobility, who lived from 1621 to 1698.
By the 18th century, the name had spread to other parts of Poland, including the Wielkopolska region in the west. In 1734, a record from the town of Poznań mentions a Katarzyna KOPYDLOWSKA, likely a female member of the family.
One of the earliest known instances of the name outside of Poland dates back to the late 18th century, when a group of KOPYDLOWSKI families settled in the area of modern-day Belarus. This was likely due to the partitions of Poland, which saw many Poles displaced from their homeland.
In the 19th century, the name KOPYDLOWSKI can be found in various records from the Russian Empire, particularly in areas with significant Polish populations, such as the Vilna Governorate (now part of Lithuania and Belarus). One notable figure from this period was Stanisław KOPYDLOWSKI, a Polish poet and writer who lived from 1813 to 1878.
As the surname spread across Europe and even to the Americas, it underwent various spelling variations, including KOPYDLOWSKY, KOPIDLOWSKI, and KOPIDLOVSKY. One early example of this is Jan KOPIDLOWSKI, a Polish immigrant to the United States who settled in Chicago in the late 19th century and worked as a blacksmith.
In the 20th century, several individuals with the KOPYDLOWSKI surname achieved notable success in various fields. These include Władysław KOPYDŁOWSKI, a Polish mathematician and educator who lived from 1903 to 1991, and Jerzy KOPYDŁOWSKI, a Polish film director and screenwriter who was born in 1928 and is still active today.
Demographics
Ancestry and ethnicity for Kopydlowski
Among Census respondents with the surname Kopydlowski, the largest self-reported group is White at 97.3%. The next largest groups are Two or More Races (1.8%) and Hispanic (0.9%).
The bar chart below shows how Kopydlowski 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 Kopydlowski 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
- Hispanic or Latino0.9% · 1
Timeline
Historical Census data for Kopydlowski
Kopydlowski 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
#143,149
National surname rank
Recorded bearers 116
+1 bearers (+0.9%)
Per 100,000 0.04
Rank movement Down 8,220 places
2020
#148,665
National surname rank
Recorded bearers 111
-5 bearers (-4.3%)
Per 100,000 0.04
Rank movement Down 5,516 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #134,929 | 115 | 0.04 | First available Census row | First available Census row |
| 2010 | #143,149 | 116 | 0.04 | +1 bearers (+0.9%) | Down 8,220 places |
| 2020 | #148,665 | 111 | 0.04 | -5 bearers (-4.3%) | Down 5,516 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 Kopydlowski 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 | #143,149 | #148,665 | -3.9% |
| Count | 116 | 111 | -4.3% |
| Per 100K | 0.04 | 0.04 | -7.2% |
Between the 2010 and 2020 Census, the number of Kopydlowski bearers went from 116 to 111 (-4.3% change). The surname moved down 5,516 positions in the national ranking, going from #143,149 to #148,665.
FAQ
Kopydlowski surname: questions and answers
How many people in the U.S. have the surname Kopydlowski?
Name Census estimates that about 127 living Americans carry the surname Kopydlowski. Using the current population baseline, that works out to roughly 1 in 2,698,853 residents.
How common is Kopydlowski?
Kopydlowski 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 Kopydlowski. 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 Kopydlowski.
Has Kopydlowski become more or less common over time?
Between 2010 and 2020, the surname Kopydlowski went from 116 recorded bearers to 111. That is a decrease of 5 (-4.3%). In the national ranking it fell from #143,149 to #148,665.
What does the Census say about the background of Kopydlowski?
Among Census respondents with the surname Kopydlowski, the largest self-reported group is White at 97.3%. The next largest groups are Two or More Races (1.8%) and Hispanic (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 Kopydlowski in the 2020 Census, accounting for 97.3% (108 people in the source table).
What is the full ancestry breakdown?
Kopydlowski 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%), Hispanic (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 Kopydlowski (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 Kopydlowski mean?
A surname of Polish origin derived from the words "kopyto" (hoof) and "lowski" (related to), likely referring to an occupational connection to horses or farriers. 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 Kopydlowski (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 Americans have the surname Kopydlowski?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.