2000
#128,797
National surname rank
Recorded bearers 122
First available Census row
Per 100,000 0.05
Very Rare Last name
Kasinski
A Polish surname likely derived from the Slavic root "kas", meaning cough or phlegm.
According to the 2020 US Census Bureau surname tables, roughly 132 Americans carry the last name Kasinski. That puts it at #145,757 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,596,624 residents).
This page is the full Name Census profile for the Kasinski 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
132
1 in 2,596,624
Census rank
#145,757
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
115
very rare in the US
Popularity narrative
The Census Bureau recorded 115 bearers of the surname Kasinski in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 145757th position in the national surname ranking.
Among Census respondents with the surname Kasinski, the largest self-reported group is White at 99.1%. The next largest groups are Two or More Races (0.9%).
Origin
Meaning and origin of Kasinski
The surname Kasinski is of Polish origin, with roots dating back to the 12th century. It is derived from the Polish word "Kasiniec," which refers to a place name or a geographic location. The name likely originated from a village or town in the Kashubian region of northern Poland.
The earliest recorded instances of the Kasinski surname can be traced back to medieval Polish records and documents. One notable reference is found in the "Kodeks Dyplomatyczny Wielkopolski" (Diplomatic Codex of Greater Poland), a collection of historical documents from the 13th century, which mentions individuals with the Kasinski surname.
In the 16th century, the Kasinski name appeared in the "Akta Grodzkie i Ziemskie" (Court and Land Records), a series of legal documents that recorded transactions, disputes, and other official proceedings. These records provide insights into the lives and activities of individuals bearing the Kasinski surname during that time period.
One of the earliest known individuals with the Kasinski surname was Jan Kasinski, a merchant and landowner who lived in the town of Gdańsk (Danzig) in the late 15th century. Records show that he was involved in trade with other cities in the Hanseatic League.
Another notable figure was Piotr Kasinski (1580-1647), a Polish military commander who fought in the Polish-Swedish War and the Smolensk War. He gained recognition for his leadership and bravery on the battlefield.
In the 18th century, Katarzyna Kasinska (1737-1798) was a prominent painter and portraitist in Warsaw. Her works were highly regarded and can be found in various art collections across Poland.
The Kasinski surname also has ties to the Kashubian people, an ethnic minority group in northern Poland. In the 19th century, Hieronim Kasinski (1815-1888) was a respected scholar and linguist who made significant contributions to the study of the Kashubian language and culture.
Towards the end of the 19th century, Józef Kasinski (1863-1932) was a renowned architect who designed several notable buildings in Kraków, including the Juliusz Słowacki Theatre and the Collegium Novum at the Jagiellonian University.
These examples illustrate the long-standing presence and historical significance of the Kasinski surname, which has been carried by individuals from various walks of life, including merchants, military leaders, artists, scholars, and architects.
Demographics
Ancestry and ethnicity for Kasinski
Among Census respondents with the surname Kasinski, the largest self-reported group is White at 99.1%. The next largest groups are Two or More Races (0.9%).
The bar chart below shows how Kasinski 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 Kasinski surname at the time of the 2020 Census, not any inherent property of the name itself.
- White99.1% · 114
- Two or more races0.9% · 1
Timeline
Historical Census data for Kasinski
Kasinski 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
#122,314
National surname rank
Recorded bearers 141
+19 bearers (+15.6%)
Per 100,000 0.05
Rank movement Up 6,483 places
2020
#145,757
National surname rank
Recorded bearers 115
-26 bearers (-18.4%)
Per 100,000 0.04
Rank movement Down 23,443 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #128,797 | 122 | 0.05 | First available Census row | First available Census row |
| 2010 | #122,314 | 141 | 0.05 | +19 bearers (+15.6%) | Up 6,483 places |
| 2020 | #145,757 | 115 | 0.04 | -26 bearers (-18.4%) | Down 23,443 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 Kasinski 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 | #122,314 | #145,757 | -19.2% |
| Count | 141 | 115 | -18.4% |
| Per 100K | 0.05 | 0.04 | -23.1% |
Between the 2010 and 2020 Census, the number of Kasinski bearers went from 141 to 115 (-18.4% change). The surname moved down 23,443 positions in the national ranking, going from #122,314 to #145,757.
FAQ
Kasinski surname: questions and answers
How many people in the U.S. have the surname Kasinski?
Name Census estimates that about 132 living Americans carry the surname Kasinski. Using the current population baseline, that works out to roughly 1 in 2,596,624 residents.
How common is Kasinski?
Kasinski ranks #145,757 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 115 people with the surname Kasinski. That is different from the site's living-bearer estimate (132), 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 Kasinski.
Has Kasinski become more or less common over time?
Between 2010 and 2020, the surname Kasinski went from 141 recorded bearers to 115. That is a decrease of 26 (-18.4%). In the national ranking it fell from #122,314 to #145,757.
What does the Census say about the background of Kasinski?
Among Census respondents with the surname Kasinski, the largest self-reported group is White at 99.1%. The next largest groups are Two or More Races (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 Kasinski in the 2020 Census, accounting for 99.1% (114 people in the source table).
What is the full ancestry breakdown?
Kasinski appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (99.1%), Two or More Races (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 Kasinski (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 Kasinski mean?
A Polish surname likely derived from the Slavic root "kas", meaning cough or phlegm. 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 Kasinski (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 Kasinski?
Our sister site HowManyOfMe.org answers how many Americans have the surname Kasinski at a glance, with the living-bearer count up front.