2000
#15,598
National surname rank
Recorded bearers 1,720
First available Census row
Per 100,000 0.64
Rare Last name
Kazmierczak
Polish surname derived from the word "koźmiór" meaning wheelwright or cartwright.
According to the 2020 US Census Bureau surname tables, roughly 2,092 Americans carry the last name Kazmierczak. That puts it at #15,465 in the national surname ranking, appearing at a frequency of 0.61 per 100,000 people (about 1 in 163,841 residents).
This page is the full Name Census profile for the Kazmierczak 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 Kazmierczak with 1881 census detail, origin facts and modern UK distribution where available.
Bearers in the US
2.1K
1 in 163,841
Census rank
#15,465
2020 decennial data
Per 100,000
0.6
Frequency rate
Recorded bearers
1.8K
rare in the US
Popularity narrative
The Census Bureau recorded 1,824 bearers of the surname Kazmierczak in its 2020 decennial surname file. At a rate of 0.61 per 100,000 residents, it holds the 15465th position in the national surname ranking.
Among Census respondents with the surname Kazmierczak, the largest self-reported group is White at 93.3%. The next largest groups are Hispanic (4.9%) and Two or More Races (1.2%).
Origin
Meaning and origin of Kazmierczak
The surname Kazmierczak is of Polish origin, with its roots tracing back to the Middle Ages. It is derived from the Polish given name Kazimierz, which itself has its origins in the Slavic name Kazimir. The name Kazimir is believed to be a compound of the words 'kaza' meaning 'to destroy' and 'mir' meaning 'world' or 'peace'. Thus, the name Kazmierczak can be interpreted as 'one who destroys the world' or 'one who destroys peace'.
The earliest known recorded instances of the surname Kazmierczak can be found in various Polish historical records from the 15th and 16th centuries. One notable mention is in the Metryka Koronna, a collection of official documents from the Polish-Lithuanian Commonwealth, where a certain Jan Kazmierczak is listed as a landowner in the region of Krakow in the year 1487.
Another significant historical figure bearing the surname Kazmierczak was Stanislaw Kazmierczak, a Polish nobleman and military commander who fought in the Polish-Swedish War of the late 17th century. He was born in 1645 and died in 1703, and was known for his bravery and strategic prowess on the battlefield.
In the realm of literature, the Polish poet and writer Jadwiga Kazmierczak, born in 1872 and died in 1951, gained recognition for her works that explored themes of love, loss, and the human condition. Her poetry collection "Echa Przeszłości" (Echoes of the Past) is considered a significant contribution to Polish literature of the early 20th century.
The name Kazmierczak can also be found in various historical records from neighboring countries, such as Germany and Ukraine, where Polish communities had settled over the centuries. One notable example is Franciszek Kazmierczak, a Polish-Ukrainian artist and painter who lived in the late 19th century and was known for his landscape paintings depicting the rural life of Ukraine.
In more recent times, the surname Kazmierczak has been borne by several notable individuals, including Janusz Kazmierczak, a Polish footballer who played for the Polish national team in the 1970s and 1980s, and Marian Kazmierczak, a Polish politician and member of the European Parliament from 2004 to 2014.
Demographics
Ancestry and ethnicity for Kazmierczak
Among Census respondents with the surname Kazmierczak, the largest self-reported group is White at 93.3%. The next largest groups are Hispanic (4.9%) and Two or More Races (1.2%).
The bar chart below shows how Kazmierczak 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 Kazmierczak surname at the time of the 2020 Census, not any inherent property of the name itself.
- White93.3% · 1,702
- Hispanic or Latino4.9% · 90
- Two or more races1.2% · 22
- Black or African American0.4% · 7
- Asian and Pacific Islander0.1% · 2
- American Indian and Alaska Native0.1% · 1
Timeline
Historical Census data for Kazmierczak
Kazmierczak 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
#16,203
National surname rank
Recorded bearers 1,782
+62 bearers (+3.6%)
Per 100,000 0.60
Rank movement Down 605 places
2020
#15,465
National surname rank
Recorded bearers 1,824
+42 bearers (+2.4%)
Per 100,000 0.61
Rank movement Up 738 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #15,598 | 1,720 | 0.64 | First available Census row | First available Census row |
| 2010 | #16,203 | 1,782 | 0.60 | +62 bearers (+3.6%) | Down 605 places |
| 2020 | #15,465 | 1,824 | 0.61 | +42 bearers (+2.4%) | Up 738 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 Kazmierczak 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 | #16,203 | #15,465 | 4.6% |
| Count | 1,782 | 1,824 | 2.4% |
| Per 100K | 0.60 | 0.61 | 1.7% |
Between the 2010 and 2020 Census, the number of Kazmierczak bearers went from 1,782 to 1,824 (+2.4% change). The surname moved up 738 positions in the national ranking, going from #16,203 to #15,465.
FAQ
Kazmierczak surname: questions and answers
How many people in the U.S. have the surname Kazmierczak?
Name Census estimates that about 2,092 living Americans carry the surname Kazmierczak. Using the current population baseline, that works out to roughly 1 in 163,841 residents.
How common is Kazmierczak?
Kazmierczak ranks #15,465 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 0.61 per 100,000 residents, which is about 1 people out of every 100,000.
How many people with this surname were counted in the Census?
The raw 2020 Census file counted 1,824 people with the surname Kazmierczak. That is different from the site's living-bearer estimate (2,092), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.61 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.61 per 100,000 means that if you picked a random group of 100,000 U.S. residents, you would expect about 1 of them to have the surname Kazmierczak.
Has Kazmierczak become more or less common over time?
Between 2010 and 2020, the surname Kazmierczak went from 1,782 recorded bearers to 1,824. That is an increase of 42 (+2.4%). In the national ranking it rose from #16,203 to #15,465.
What does the Census say about the background of Kazmierczak?
Among Census respondents with the surname Kazmierczak, the largest self-reported group is White at 93.3%. The next largest groups are Hispanic (4.9%) and Two or More Races (1.2%). 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 Kazmierczak in the 2020 Census, accounting for 93.3% (1,702 people in the source table).
What is the full ancestry breakdown?
Kazmierczak appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (93.3%), Hispanic (4.9%), Two or More Races (1.2%). 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 Kazmierczak (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 Kazmierczak mean?
Polish surname derived from the word "koźmiór" meaning wheelwright or cartwright. 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 Kazmierczak (0.61 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 share the surname Kazmierczak?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.