2010
#157,234
National surname rank
Recorded bearers 103
First available Census row
Per 100,000 0.03
Very Rare Last name
Simkowski
A Polish surname derived from the personal name Szymon.
According to the 2020 US Census Bureau surname tables, roughly 130 Americans carry the last name Simkowski. 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 Simkowski 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 Simkowski 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 Simkowski, the largest self-reported group is White at 98.2%. The next largest groups are Black (0.9%) and Hispanic (0.9%).
Origin
Meaning and origin of Simkowski
The surname Simkowski originated in Poland and is a derivative of the Polish name Simek, which itself derives from the shortened form of the biblical name Simeon. The name can be traced back to the 14th century in various regions of Poland, with early spellings including Simkowski, Symkowski, and Ssymkowski.
One of the earliest recorded mentions of the Simkowski name can be found in the Akta Grodzkie, a collection of court records from the Polish town of Radom, dating back to the late 15th century. These records reference a certain Marcin Simkowski, who was involved in a land dispute in the year 1487.
The name Simkowski is also present in the Metryka Koronna, a set of official records maintained by the Polish Crown, which includes several entries from the 16th and 17th centuries mentioning individuals with this surname. For instance, a record from 1621 refers to a nobleman named Jan Simkowski, who was granted a coat of arms by the Polish king.
In the 18th century, the Simkowski name appears in various parish records and tax registers from different regions of Poland. One notable example is Stanisław Simkowski, born in 1732, who was a prominent landowner and philanthropist in the Kraków region.
As the Polish diaspora spread across Europe and beyond, the Simkowski name traveled with them. In the 19th century, there are records of Simkowski families settling in various parts of the Russian Empire, as well as in Germany and the United States. One notable American bearer of this name was Józef Simkowski, born in 1845 in Poznań, who became a successful businessman and community leader in Chicago after emigrating in the 1870s.
Other notable individuals with the Simkowski surname include Franciszek Simkowski (1798-1872), a Polish painter and art educator; Kazimierz Simkowski (1866-1928), a Polish composer and conductor; and Władysław Simkowski (1911-1980), a Polish military officer who fought in World War II and later became a respected historian.
Demographics
Ancestry and ethnicity for Simkowski
Among Census respondents with the surname Simkowski, the largest self-reported group is White at 98.2%. The next largest groups are Black (0.9%) and Hispanic (0.9%).
The bar chart below shows how Simkowski 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 Simkowski surname at the time of the 2020 Census, not any inherent property of the name itself.
- White98.2% · 111
- Black or African American0.9% · 1
- Hispanic or Latino0.9% · 1
Timeline
Historical Census data for Simkowski
Simkowski appears in 2 published Census surname files: 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2020
#147,221
National surname rank
Recorded bearers 113
+10 bearers (+9.7%)
Per 100,000 0.04
Rank movement Up 10,013 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #157,234 | 103 | 0.03 | First available Census row | First available Census row |
| 2020 | #147,221 | 113 | 0.04 | +10 bearers (+9.7%) | Up 10,013 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 Simkowski 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 | #157,234 | #147,221 | 6.4% |
| Count | 103 | 113 | 9.7% |
| Per 100K | 0.03 | 0.04 | 26.0% |
Between the 2010 and 2020 Census, the number of Simkowski bearers went from 103 to 113 (+9.7% change). The surname moved up 10,013 positions in the national ranking, going from #157,234 to #147,221.
FAQ
Simkowski surname: questions and answers
How many people in the U.S. have the surname Simkowski?
Name Census estimates that about 130 living Americans carry the surname Simkowski. Using the current population baseline, that works out to roughly 1 in 2,636,572 residents.
How common is Simkowski?
Simkowski 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 Simkowski. 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 Simkowski.
Has Simkowski become more or less common over time?
Between 2010 and 2020, the surname Simkowski went from 103 recorded bearers to 113. That is an increase of 10 (+9.7%). In the national ranking it rose from #157,234 to #147,221.
What does the Census say about the background of Simkowski?
Among Census respondents with the surname Simkowski, the largest self-reported group is White at 98.2%. The next largest groups are Black (0.9%) and Hispanic (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 Simkowski in the 2020 Census, accounting for 98.2% (111 people in the source table).
What is the full ancestry breakdown?
Simkowski appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (98.2%), Black (0.9%), Hispanic (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 Simkowski (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 Simkowski mean?
A Polish surname derived from the personal name Szymon. 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 Simkowski (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 Simkowski?
Want to know how many Americans have the surname Simkowski? HowManyOfMe.org, our sister site, puts the living-bearer count front and centre.