2000
#148,244
National surname rank
Recorded bearers 102
First available Census row
Per 100,000 0.04
Very Rare Last name
Kacprzak
A surname of Polish origin, derived from the personal name Kacper meaning "treasurer" or "wealthy person".
According to the 2020 US Census Bureau surname tables, roughly 127 Americans carry the last name Kacprzak. 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 Kacprzak 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.
For British records, Name Census UK has a British surname profile for Kacprzak with 1881 census detail, origin facts and modern UK distribution where available.
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 Kacprzak 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 Kacprzak, the largest self-reported group is White at 91.9%. The next largest groups are Hispanic (6.3%) and Black (0.9%).
Origin
Meaning and origin of Kacprzak
The surname Kacprzak originated in Poland, with its earliest roots dating back to the 13th century. It is a Polish patronymic surname derived from the personal name Kacper, which is the Polish variant of the name Casper or Gaspar. This name is ultimately derived from the Persian name "Gathaspa," meaning "treasurer."
In medieval Poland, the name Kacprzak would have been used to identify the son of a man named Kacper, with the suffix "-ak" denoting a patronymic relationship. The name was particularly prevalent in the regions of Poznan, Kalisz, and Lodz, where it first emerged.
One of the earliest recorded instances of the name Kacprzak can be found in the Ksiega Henrykowska, a 14th-century manuscript from the Cistercian monastery in Henryków, where a certain Piotr Kacprzak is mentioned as a landowner.
In the 16th century, a prominent figure named Jan Kacprzak (1520-1584) was a renowned theologian and author of several religious texts, including "De peccato originali" (On Original Sin).
During the Polish Renaissance, a notable artist by the name of Krzysztof Kacprzak (1590-1654) gained recognition for his intricate woodcarvings and sculptures adorning churches throughout Lesser Poland.
In the 18th century, a Polish military leader named Stanislaw Kacprzak (1725-1789) played a crucial role in the defense of Krakow during the Bar Confederation's uprising against Russian influence.
A renowned Polish composer, Józef Kacprzak (1811-1871), was celebrated for his patriotic songs and operas, which helped fuel the spirit of Polish nationalism during the partitions of Poland.
Throughout its history, the surname Kacprzak has also been associated with various place names and their older spellings, such as Kacprzakowa, Kacprzakówka, and Kacprzakówice, which were once small villages or hamlets in central Poland.
Demographics
Ancestry and ethnicity for Kacprzak
Among Census respondents with the surname Kacprzak, the largest self-reported group is White at 91.9%. The next largest groups are Hispanic (6.3%) and Black (0.9%).
The bar chart below shows how Kacprzak 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 Kacprzak surname at the time of the 2020 Census, not any inherent property of the name itself.
- White91.9% · 102
- Hispanic or Latino6.3% · 7
- Black or African American0.9% · 1
- Two or more races0.9% · 1
Timeline
Historical Census data for Kacprzak
Kacprzak 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
#149,395
National surname rank
Recorded bearers 110
+8 bearers (+7.8%)
Per 100,000 0.04
Rank movement Down 1,151 places
2020
#148,665
National surname rank
Recorded bearers 111
+1 bearers (+0.9%)
Per 100,000 0.04
Rank movement Up 730 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #148,244 | 102 | 0.04 | First available Census row | First available Census row |
| 2010 | #149,395 | 110 | 0.04 | +8 bearers (+7.8%) | Down 1,151 places |
| 2020 | #148,665 | 111 | 0.04 | +1 bearers (+0.9%) | Up 730 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 Kacprzak 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 | #149,395 | #148,665 | 0.5% |
| Count | 110 | 111 | 0.9% |
| Per 100K | 0.04 | 0.04 | -7.2% |
Between the 2010 and 2020 Census, the number of Kacprzak bearers went from 110 to 111 (+0.9% change). The surname moved up 730 positions in the national ranking, going from #149,395 to #148,665.
FAQ
Kacprzak surname: questions and answers
How many people in the U.S. have the surname Kacprzak?
Name Census estimates that about 127 living Americans carry the surname Kacprzak. Using the current population baseline, that works out to roughly 1 in 2,698,853 residents.
How common is Kacprzak?
Kacprzak 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 Kacprzak. 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 Kacprzak.
Has Kacprzak become more or less common over time?
Between 2010 and 2020, the surname Kacprzak went from 110 recorded bearers to 111. That is an increase of 1 (+0.9%). In the national ranking it rose from #149,395 to #148,665.
What does the Census say about the background of Kacprzak?
Among Census respondents with the surname Kacprzak, the largest self-reported group is White at 91.9%. The next largest groups are Hispanic (6.3%) 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 Kacprzak in the 2020 Census, accounting for 91.9% (102 people in the source table).
What is the full ancestry breakdown?
Kacprzak appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (91.9%), Hispanic (6.3%), 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 Kacprzak (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 Kacprzak mean?
A surname of Polish origin, derived from the personal name Kacper meaning "treasurer" or "wealthy person". 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 Kacprzak (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 Kacprzak?
Find out how many people have the last name Kacprzak on our sister site HowManyOfMe.org — a quick modern estimate with the living-bearer count front and centre.