2000
#133,114
National surname rank
Recorded bearers 117
First available Census row
Per 100,000 0.04
Very Rare Last name
Korkosz
A Polish surname potentially derived from the word "korzec" meaning a unit of dry measure.
According to the 2020 US Census Bureau surname tables, roughly 130 Americans carry the last name Korkosz. That puts it at #147,221 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,636,572 residents).
This page is the full Name Census profile for the Korkosz 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
130
1 in 2,636,572
Census rank
#147,221
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
113
very rare in the US
Popularity narrative
The Census Bureau recorded 113 bearers of the surname Korkosz in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 147221st position in the national surname ranking.
Among Census respondents with the surname Korkosz, the largest self-reported group is White at 91.2%. The next largest groups are Hispanic (5.3%) and Two or More Races (1.8%).
Origin
Meaning and origin of Korkosz
The surname Korkosz is of Polish origin, originating in the late 16th or early 17th century. It is derived from the Polish word "korkosz," which means "a maker of corks or stoppers." The name likely originated in the regions of Masovia or Lesser Poland, where there were significant cork-making industries.
One of the earliest recorded instances of the Korkosz surname can be found in the parish records of the village of Wieliczka, near Krakow, from the early 17th century. This record mentions a certain Jan Korkosz, who was a cork maker by trade.
In the 18th century, the Korkosz surname appears in several documents from the city of Poznan, suggesting the family had established roots in the Greater Poland region. The 1765 census of Poznan lists a family headed by Tomasz Korkosz, a cork maker and merchant.
The Korkosz surname has also been associated with several notable individuals throughout history. In the late 18th century, Marcin Korkosz (1753-1831) was a prominent lawyer and judge in the city of Lublin. He was known for his expertise in civil law and served as a magistrate for many years.
In the 19th century, Józef Korkosz (1815-1892) was a renowned architect in Warsaw, responsible for designing several notable buildings, including the iconic St. Alexander's Church.
Another notable figure was Franciszek Korkosz (1871-1945), a Polish writer and journalist who wrote extensively on political and social issues during the interwar period.
During World War II, Kazimierz Korkosz (1910-1944) was a member of the Polish resistance movement and fought against the Nazi occupation. He was captured and executed by the Gestapo in 1944 for his involvement in the Warsaw Uprising.
Ewa Korkosz (1939-2017) was a celebrated Polish actress and theater director, known for her performances in both classical and contemporary plays. She was awarded several prestigious awards for her contributions to Polish theater.
While the Korkosz surname is not among the most common in Poland, it has a rich history dating back several centuries and has been associated with various notable figures across different fields.
Demographics
Ancestry and ethnicity for Korkosz
Among Census respondents with the surname Korkosz, the largest self-reported group is White at 91.2%. The next largest groups are Hispanic (5.3%) and Two or More Races (1.8%).
The bar chart below shows how Korkosz 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 Korkosz surname at the time of the 2020 Census, not any inherent property of the name itself.
- White91.2% · 103
- Hispanic or Latino5.3% · 6
- Two or more races1.8% · 2
- Black or African American0.9% · 1
- American Indian and Alaska Native0.9% · 1
Timeline
Historical Census data for Korkosz
Korkosz 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
-3 bearers (-2.6%)
Per 100,000 0.04
Rank movement Down 12,106 places
2020
#147,221
National surname rank
Recorded bearers 113
-1 bearers (-0.9%)
Per 100,000 0.04
Rank movement Down 2,001 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #133,114 | 117 | 0.04 | First available Census row | First available Census row |
| 2010 | #145,220 | 114 | 0.04 | -3 bearers (-2.6%) | Down 12,106 places |
| 2020 | #147,221 | 113 | 0.04 | -1 bearers (-0.9%) | Down 2,001 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 Korkosz 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 | #147,221 | -1.4% |
| Count | 114 | 113 | -0.9% |
| Per 100K | 0.04 | 0.04 | -5.5% |
Between the 2010 and 2020 Census, the number of Korkosz bearers went from 114 to 113 (-0.9% change). The surname moved down 2,001 positions in the national ranking, going from #145,220 to #147,221.
FAQ
Korkosz surname: questions and answers
How many people in the U.S. have the surname Korkosz?
Name Census estimates that about 130 living Americans carry the surname Korkosz. Using the current population baseline, that works out to roughly 1 in 2,636,572 residents.
How common is Korkosz?
Korkosz ranks #147,221 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 113 people with the surname Korkosz. That is different from the site's living-bearer estimate (130), 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 Korkosz.
Has Korkosz become more or less common over time?
Between 2010 and 2020, the surname Korkosz went from 114 recorded bearers to 113. That is a decrease of 1 (-0.9%). In the national ranking it fell from #145,220 to #147,221.
What does the Census say about the background of Korkosz?
Among Census respondents with the surname Korkosz, the largest self-reported group is White at 91.2%. The next largest groups are Hispanic (5.3%) and Two or More Races (1.8%). 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 Korkosz in the 2020 Census, accounting for 91.2% (103 people in the source table).
What is the full ancestry breakdown?
Korkosz appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (91.2%), Hispanic (5.3%), Two or More Races (1.8%). 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 Korkosz (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 Korkosz mean?
A Polish surname potentially derived from the word "korzec" meaning a unit of dry measure. 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 Korkosz (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 common is the surname Korkosz?
You can see how many people are called Korkosz on our sister site HowManyOfMe.org — same data roots, lighter UI.