2000
#131,366
National surname rank
Recorded bearers 119
First available Census row
Per 100,000 0.04
Very Rare Last name
Sitkiewicz
A Polish surname derived from the Polish word "sitek", meaning a small sieve or sifter.
According to the 2020 US Census Bureau surname tables, roughly 135 Americans carry the last name Sitkiewicz. That puts it at #143,511 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,538,921 residents).
This page is the full Name Census profile for the Sitkiewicz 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
135
1 in 2,538,921
Census rank
#143,511
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
118
very rare in the US
Popularity narrative
The Census Bureau recorded 118 bearers of the surname Sitkiewicz in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 143511th position in the national surname ranking.
Among Census respondents with the surname Sitkiewicz, the largest self-reported group is White at 93.2%. The next largest groups are Hispanic (4.2%) and Two or More Races (1.7%).
Origin
Meaning and origin of Sitkiewicz
The surname Sitkiewicz is of Polish origin, tracing its roots back to the late medieval period in the region now known as central and eastern Poland. It is derived from the Polish word "sitko," which means "sieve" or "strainer," suggesting a connection to occupations or trades involving the use of these tools, such as miller or baker.
The name's earliest recorded instances can be found in historical documents from the 15th and 16th centuries, often in the regions of Mazovia and Lesser Poland. One notable early appearance is in the Metryka Koronna, a collection of records from the Polish-Lithuanian Commonwealth, where a certain Stanislaw Sitkiewicz is mentioned as a landowner in the town of Sandomierz in the year 1532.
During the 16th and 17th centuries, the surname Sitkiewicz appeared in various Polish chronicles and records, often associated with individuals from the gentry or noble class. For instance, a Jakub Sitkiewicz is recorded as a participant in the Siege of Smolensk in 1634, fighting alongside the Polish forces against the Russian army.
In the 18th century, the name gained more prominence with the rise of a notable family of Polish nobles and landowners. Franciszek Sitkiewicz, born in 1745, was a respected military commander who served in the Polish-Lithuanian Commonwealth's armed forces and fought in the wars against Russia and Prussia. His son, Kazimierz Sitkiewicz (1786-1856), was a renowned poet and playwright, known for his contributions to the Polish Romantic literary movement.
Another notable figure bearing this surname was Wladyslaw Sitkiewicz (1880-1942), a Polish politician and diplomat who served as the Minister of Foreign Affairs for the Second Polish Republic in the early 20th century. He played a crucial role in shaping Poland's foreign policy during the interwar period.
The Sitkiewicz name has also been associated with several prominent scholars and academics throughout history. One example is Andrzej Sitkiewicz (1924-2010), a renowned Polish mathematician and logician who made significant contributions to the field of set theory and mathematical logic.
While the surname Sitkiewicz has its roots in Poland, it has since spread to other parts of the world through migration and diaspora communities. However, its origins and historical significance remain deeply tied to the rich cultural heritage of central and eastern Europe.
Demographics
Ancestry and ethnicity for Sitkiewicz
Among Census respondents with the surname Sitkiewicz, the largest self-reported group is White at 93.2%. The next largest groups are Hispanic (4.2%) and Two or More Races (1.7%).
The bar chart below shows how Sitkiewicz 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 Sitkiewicz surname at the time of the 2020 Census, not any inherent property of the name itself.
- White93.2% · 110
- Hispanic or Latino4.2% · 5
- Two or more races1.7% · 2
- Asian and Pacific Islander0.8% · 1
Timeline
Historical Census data for Sitkiewicz
Sitkiewicz 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
#135,593
National surname rank
Recorded bearers 124
+5 bearers (+4.2%)
Per 100,000 0.04
Rank movement Down 4,227 places
2020
#143,511
National surname rank
Recorded bearers 118
-6 bearers (-4.8%)
Per 100,000 0.04
Rank movement Down 7,918 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #131,366 | 119 | 0.04 | First available Census row | First available Census row |
| 2010 | #135,593 | 124 | 0.04 | +5 bearers (+4.2%) | Down 4,227 places |
| 2020 | #143,511 | 118 | 0.04 | -6 bearers (-4.8%) | Down 7,918 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 Sitkiewicz 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 | #135,593 | #143,511 | -5.8% |
| Count | 124 | 118 | -4.8% |
| Per 100K | 0.04 | 0.04 | -1.3% |
Between the 2010 and 2020 Census, the number of Sitkiewicz bearers went from 124 to 118 (-4.8% change). The surname moved down 7,918 positions in the national ranking, going from #135,593 to #143,511.
FAQ
Sitkiewicz surname: questions and answers
How many people in the U.S. have the surname Sitkiewicz?
Name Census estimates that about 135 living Americans carry the surname Sitkiewicz. Using the current population baseline, that works out to roughly 1 in 2,538,921 residents.
How common is Sitkiewicz?
Sitkiewicz ranks #143,511 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 118 people with the surname Sitkiewicz. That is different from the site's living-bearer estimate (135), 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 Sitkiewicz.
Has Sitkiewicz become more or less common over time?
Between 2010 and 2020, the surname Sitkiewicz went from 124 recorded bearers to 118. That is a decrease of 6 (-4.8%). In the national ranking it fell from #135,593 to #143,511.
What does the Census say about the background of Sitkiewicz?
Among Census respondents with the surname Sitkiewicz, the largest self-reported group is White at 93.2%. The next largest groups are Hispanic (4.2%) and Two or More Races (1.7%). 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 Sitkiewicz in the 2020 Census, accounting for 93.2% (110 people in the source table).
What is the full ancestry breakdown?
Sitkiewicz appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (93.2%), Hispanic (4.2%), Two or More Races (1.7%). 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 Sitkiewicz (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 Sitkiewicz mean?
A Polish surname derived from the Polish word "sitek", meaning a small sieve or sifter. 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 Sitkiewicz (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 share the surname Sitkiewicz?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.