2000
#134,037
National surname rank
Recorded bearers 116
First available Census row
Per 100,000 0.04
Very Rare Last name
Lopacki
A Polish topographic surname derived from a lowland area.
According to the 2020 US Census Bureau surname tables, roughly 139 Americans carry the last name Lopacki. That puts it at #141,309 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,465,859 residents).
This page is the full Name Census profile for the Lopacki 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
139
1 in 2,465,859
Census rank
#141,309
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
121
very rare in the US
Popularity narrative
The Census Bureau recorded 121 bearers of the surname Lopacki in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 141309th position in the national surname ranking.
Among Census respondents with the surname Lopacki, the largest self-reported group is White at 95.9%. The next largest groups are Hispanic (2.5%) and Black (0.8%).
Origin
Meaning and origin of Lopacki
The surname Lopacki is of Polish origin, derived from the Old Polish word "łopata" meaning "spade" or "shovel." This name likely originated in the late Middle Ages or early Renaissance period when surnames began to emerge as a way to identify individuals by their occupation or place of residence.
The name Lopacki first appeared in historical records from the 16th century, such as the Polish land registers and church documents. It was commonly found in the regions of Mazovia and Greater Poland, where many Polish families with this surname resided.
One of the earliest known bearers of the name was Jan Lopacki, a landowner and nobleman from the town of Łopacin in central Poland, born around 1520. Another notable figure was Marcin Lopacki, a merchant and trader who lived in the city of Krakow in the late 16th century.
In the 17th century, the Lopacki name can be found in various historical sources, including parish records and court documents. One prominent individual was Wojciech Lopacki, a renowned scholar and professor at the University of Krakow, who lived from 1605 to 1679.
During the 18th century, the Lopacki family continued to play a significant role in Polish society. Stanisław Lopacki, born in 1735, was a respected military officer who served in the Polish Army during the reign of King Stanisław August Poniatowski.
In the 19th century, the name Lopacki gained recognition through individuals such as Józef Lopacki, a prominent writer and poet born in 1809, and Władysław Lopacki, a renowned painter and artist active in the late 1800s.
While the name Lopacki is predominantly found in Poland, it has also spread to other parts of the world due to migration and diaspora. However, its roots can be traced back to the Polish lands, where it originated from the occupation of spade or shovel makers or workers who used these tools.
Demographics
Ancestry and ethnicity for Lopacki
Among Census respondents with the surname Lopacki, the largest self-reported group is White at 95.9%. The next largest groups are Hispanic (2.5%) and Black (0.8%).
The bar chart below shows how Lopacki 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 Lopacki surname at the time of the 2020 Census, not any inherent property of the name itself.
- White95.9% · 116
- Hispanic or Latino2.5% · 3
- Black or African American0.8% · 1
- Two or more races0.8% · 1
Timeline
Historical Census data for Lopacki
Lopacki 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
#147,253
National surname rank
Recorded bearers 112
-4 bearers (-3.4%)
Per 100,000 0.04
Rank movement Down 13,216 places
2020
#141,309
National surname rank
Recorded bearers 121
+9 bearers (+8.0%)
Per 100,000 0.04
Rank movement Up 5,944 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #134,037 | 116 | 0.04 | First available Census row | First available Census row |
| 2010 | #147,253 | 112 | 0.04 | -4 bearers (-3.4%) | Down 13,216 places |
| 2020 | #141,309 | 121 | 0.04 | +9 bearers (+8.0%) | Up 5,944 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 Lopacki 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 | #147,253 | #141,309 | 4.0% |
| Count | 112 | 121 | 8.0% |
| Per 100K | 0.04 | 0.04 | 1.2% |
Between the 2010 and 2020 Census, the number of Lopacki bearers went from 112 to 121 (+8.0% change). The surname moved up 5,944 positions in the national ranking, going from #147,253 to #141,309.
FAQ
Lopacki surname: questions and answers
How many people in the U.S. have the surname Lopacki?
Name Census estimates that about 139 living Americans carry the surname Lopacki. Using the current population baseline, that works out to roughly 1 in 2,465,859 residents.
How common is Lopacki?
Lopacki ranks #141,309 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 121 people with the surname Lopacki. That is different from the site's living-bearer estimate (139), 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 Lopacki.
Has Lopacki become more or less common over time?
Between 2010 and 2020, the surname Lopacki went from 112 recorded bearers to 121. That is an increase of 9 (+8.0%). In the national ranking it rose from #147,253 to #141,309.
What does the Census say about the background of Lopacki?
Among Census respondents with the surname Lopacki, the largest self-reported group is White at 95.9%. The next largest groups are Hispanic (2.5%) and Black (0.8%). 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 Lopacki in the 2020 Census, accounting for 95.9% (116 people in the source table).
What is the full ancestry breakdown?
Lopacki appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (95.9%), Hispanic (2.5%), Black (0.8%). 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 Lopacki (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 Lopacki mean?
A Polish topographic surname derived from a lowland area. 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 Lopacki (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 are called Lopacki?
Our sister site HowManyOfMe.org answers how many people have the surname Lopacki at a glance, with the living-bearer count up front.