2000
#129,619
National surname rank
Recorded bearers 121
First available Census row
Per 100,000 0.04
Very Rare Last name
Kazmerski
A Polish surname likely derived from a diminutive of the name "Kazimierz" or "Kazimir".
According to the 2020 US Census Bureau surname tables, roughly 128 Americans carry the last name Kazmerski. That puts it at #147,954 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,677,768 residents).
This page is the full Name Census profile for the Kazmerski 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
128
1 in 2,677,768
Census rank
#147,954
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
112
very rare in the US
Popularity narrative
The Census Bureau recorded 112 bearers of the surname Kazmerski in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 147954th position in the national surname ranking.
Among Census respondents with the surname Kazmerski, the largest self-reported group is White at 85.7%. The next largest groups are Hispanic (7.1%) and Two or More Races (4.5%).
Origin
Meaning and origin of Kazmerski
The surname Kazmerski is of Polish origin, originating in the late 16th century. It is derived from the personal name Kazimierz, a Polonized version of the Old German name Casimir, which means "to destroy the peace." This name was popular among Polish nobility and royalty, with several Polish kings bearing the name Kazimierz.
The earliest recorded instances of the surname Kazmerski can be found in historical records from the regions of Wielkopolska and Małopolska in present-day Poland. The name was often spelled with variations such as Kaźmierski, Kazmirski, or Kazmierski, reflecting the regional dialects of the time.
One of the earliest known individuals with the surname Kazmerski was Jan Kazmerski, a Polish nobleman born in the late 16th century. Records indicate that he owned lands in the village of Kazimierz near Kraków, which may have influenced the spelling of his surname.
In the 17th century, the Kazmerski family gained prominence in the Polish-Lithuanian Commonwealth. Marcin Kazmerski (1610-1678) was a renowned military commander who served under King John III Sobieski during the Polish-Ottoman wars. He was awarded estates in the Lublin region for his bravery and military victories.
During the 18th century, the surname Kazmerski appeared in various historical records across Poland. Notable individuals included Franciszek Kazmerski (1725-1802), a respected jurist and legal scholar who served as a judge in the Crown Tribunal of the Polish-Lithuanian Commonwealth.
In the 19th century, the Kazmerski family produced several notable figures, including Michał Kazmerski (1810-1887), a Polish writer and poet who was active in the cultural and literary circles of Warsaw. His works explored themes of Polish identity and patriotism during the partitions of Poland.
Another prominent individual with the surname Kazmerski was Stanisław Kazmerski (1865-1938), a Polish engineer and inventor who made significant contributions to the development of early aviation technology. He designed and built several experimental aircraft prototypes in the early 20th century, paving the way for future advancements in aeronautics.
While the surname Kazmerski has its roots in Poland, individuals bearing this name have since migrated to various parts of the world, including North America and Western Europe. However, the surname's rich historical legacy and connection to Polish culture and heritage remain evident in its enduring presence throughout the centuries.
Demographics
Ancestry and ethnicity for Kazmerski
Among Census respondents with the surname Kazmerski, the largest self-reported group is White at 85.7%. The next largest groups are Hispanic (7.1%) and Two or More Races (4.5%).
The bar chart below shows how Kazmerski 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 Kazmerski surname at the time of the 2020 Census, not any inherent property of the name itself.
- White85.7% · 96
- Hispanic or Latino7.1% · 8
- Two or more races4.5% · 5
- Asian and Pacific Islander1.8% · 2
- Black or African American0.9% · 1
Timeline
Historical Census data for Kazmerski
Kazmerski 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
#145,220
National surname rank
Recorded bearers 114
-7 bearers (-5.8%)
Per 100,000 0.04
Rank movement Down 15,601 places
2020
#147,954
National surname rank
Recorded bearers 112
-2 bearers (-1.8%)
Per 100,000 0.04
Rank movement Down 2,734 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #129,619 | 121 | 0.04 | First available Census row | First available Census row |
| 2010 | #145,220 | 114 | 0.04 | -7 bearers (-5.8%) | Down 15,601 places |
| 2020 | #147,954 | 112 | 0.04 | -2 bearers (-1.8%) | Down 2,734 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 Kazmerski 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 | #145,220 | #147,954 | -1.9% |
| Count | 114 | 112 | -1.8% |
| Per 100K | 0.04 | 0.04 | -6.3% |
Between the 2010 and 2020 Census, the number of Kazmerski bearers went from 114 to 112 (-1.8% change). The surname moved down 2,734 positions in the national ranking, going from #145,220 to #147,954.
FAQ
Kazmerski surname: questions and answers
How many people in the U.S. have the surname Kazmerski?
Name Census estimates that about 128 living Americans carry the surname Kazmerski. Using the current population baseline, that works out to roughly 1 in 2,677,768 residents.
How common is Kazmerski?
Kazmerski ranks #147,954 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 112 people with the surname Kazmerski. That is different from the site's living-bearer estimate (128), 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 Kazmerski.
Has Kazmerski become more or less common over time?
Between 2010 and 2020, the surname Kazmerski went from 114 recorded bearers to 112. That is a decrease of 2 (-1.8%). In the national ranking it fell from #145,220 to #147,954.
What does the Census say about the background of Kazmerski?
Among Census respondents with the surname Kazmerski, the largest self-reported group is White at 85.7%. The next largest groups are Hispanic (7.1%) and Two or More Races (4.5%). 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 Kazmerski in the 2020 Census, accounting for 85.7% (96 people in the source table).
What is the full ancestry breakdown?
Kazmerski appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (85.7%), Hispanic (7.1%), Two or More Races (4.5%). 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 Kazmerski (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 Kazmerski mean?
A Polish surname likely derived from a diminutive of the name "Kazimierz" or "Kazimir". 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 Kazmerski (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 have the last name Kazmerski?
You can see how many people are called Kazmerski on our sister site HowManyOfMe.org — same data roots, lighter UI.