2000
#127,186
National surname rank
Recorded bearers 124
First available Census row
Per 100,000 0.05
Very Rare Last name
Kopacka
A locational surname derived from the town of Kopačka in Serbia.
According to the 2020 US Census Bureau surname tables, roughly 117 Americans carry the last name Kopacka. That puts it at #154,755 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,929,524 residents).
This page is the full Name Census profile for the Kopacka 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
117
1 in 2,929,524
Census rank
#154,755
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
102
very rare in the US
Popularity narrative
The Census Bureau recorded 102 bearers of the surname Kopacka in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 154755th position in the national surname ranking.
Among Census respondents with the surname Kopacka, the largest self-reported group is White at 83.3%. The next largest groups are Hispanic (12.7%) and Two or More Races (3.9%).
Origin
Meaning and origin of Kopacka
The surname Kopacka is of Czech origin, with the name first appearing in historical records from the early 16th century. It is believed to have originated as a occupational surname, derived from the Czech word "kopac" meaning "digger" or "ditcher". This suggests that the original bearers of the name were likely involved in some form of manual labor related to digging or excavation work.
The earliest known record of the name Kopacka dates back to 1521, when a man named Jakub Kopacka was mentioned in a land registry document from the town of Kutná Hora, located in the region of Bohemia (now part of the Czech Republic). This region was known for its rich deposits of silver and other precious metals, which could explain the connection to digging or mining activities.
In the 17th century, the name Kopacka can be found in various parish records and censuses from various parts of Bohemia and Moravia (another historical region of the Czech lands). Some variations in spelling, such as Kopaczka or Kopacka, were also commonly encountered during this time period.
One notable individual with this surname was Jan Kopacka (1592-1664), a Catholic priest and theologian from the city of Olomouc in Moravia. He was known for his work as a preacher and his writings on religious subjects.
Another historical figure bearing the Kopacka name was Václav Kopacka (1805-1879), a Czech journalist and writer who lived in Prague. He was a prominent figure in the Czech National Revival movement and worked to promote the use of the Czech language in literature and education.
In the 19th century, the name Kopacka also appeared in several villages and towns in the Austro-Hungarian Empire, which at the time included parts of present-day Czech Republic, Slovakia, and Austria. For example, the village of Kopačka (now in Slovakia) likely derived its name from the presence of families with the surname Kopacka in the area.
Stanislav Kopacka (1870-1942) was a Czech politician and lawyer who served as a member of the Austro-Hungarian Imperial Council and later the National Assembly of Czechoslovakia after the country's independence in 1918.
Finally, Jaroslav Kopacka (1892-1954) was a Czech composer and music teacher who lived in the early 20th century. He is known for his compositions for orchestra and chamber ensembles, as well as his work in music education.
Demographics
Ancestry and ethnicity for Kopacka
Among Census respondents with the surname Kopacka, the largest self-reported group is White at 83.3%. The next largest groups are Hispanic (12.7%) and Two or More Races (3.9%).
The bar chart below shows how Kopacka 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 Kopacka surname at the time of the 2020 Census, not any inherent property of the name itself.
- White83.3% · 85
- Hispanic or Latino12.7% · 13
- Two or more races3.9% · 4
Timeline
Historical Census data for Kopacka
Kopacka 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
#151,532
National surname rank
Recorded bearers 108
-16 bearers (-12.9%)
Per 100,000 0.04
Rank movement Down 24,346 places
2020
#154,755
National surname rank
Recorded bearers 102
-6 bearers (-5.6%)
Per 100,000 0.03
Rank movement Down 3,223 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #127,186 | 124 | 0.05 | First available Census row | First available Census row |
| 2010 | #151,532 | 108 | 0.04 | -16 bearers (-12.9%) | Down 24,346 places |
| 2020 | #154,755 | 102 | 0.03 | -6 bearers (-5.6%) | Down 3,223 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 Kopacka 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 | #151,532 | #154,755 | -2.1% |
| Count | 108 | 102 | -5.6% |
| Per 100K | 0.04 | 0.03 | -14.7% |
Between the 2010 and 2020 Census, the number of Kopacka bearers went from 108 to 102 (-5.6% change). The surname moved down 3,223 positions in the national ranking, going from #151,532 to #154,755.
FAQ
Kopacka surname: questions and answers
How many people in the U.S. have the surname Kopacka?
Name Census estimates that about 117 living Americans carry the surname Kopacka. Using the current population baseline, that works out to roughly 1 in 2,929,524 residents.
How common is Kopacka?
Kopacka ranks #154,755 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.03 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 102 people with the surname Kopacka. That is different from the site's living-bearer estimate (117), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.03 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.03 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 Kopacka.
Has Kopacka become more or less common over time?
Between 2010 and 2020, the surname Kopacka went from 108 recorded bearers to 102. That is a decrease of 6 (-5.6%). In the national ranking it fell from #151,532 to #154,755.
What does the Census say about the background of Kopacka?
Among Census respondents with the surname Kopacka, the largest self-reported group is White at 83.3%. The next largest groups are Hispanic (12.7%) and Two or More Races (3.9%). 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 Kopacka in the 2020 Census, accounting for 83.3% (85 people in the source table).
What is the full ancestry breakdown?
Kopacka appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (83.3%), Hispanic (12.7%), Two or More Races (3.9%). 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 Kopacka (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 Kopacka mean?
A locational surname derived from the town of Kopačka in Serbia. 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 Kopacka (0.03 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 Kopacka?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.