2000
#150,436
National surname rank
Recorded bearers 100
First available Census row
Per 100,000 0.04
Very Rare Last name
Simacek
An occupational surname derived from the Czech word meaning a sieve maker.
According to the 2020 US Census Bureau surname tables, roughly 131 Americans carry the last name Simacek. That puts it at #146,495 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,616,445 residents).
This page is the full Name Census profile for the Simacek 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
131
1 in 2,616,445
Census rank
#146,495
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
114
very rare in the US
Popularity narrative
The Census Bureau recorded 114 bearers of the surname Simacek in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 146495th position in the national surname ranking.
Among Census respondents with the surname Simacek, the largest self-reported group is White at 92.1%. The next largest groups are Hispanic (4.4%) and Two or More Races (1.8%).
Origin
Meaning and origin of Simacek
The surname Simacek has its origins in the Czech Republic and is thought to date back to the late 15th century. It is believed to be derived from the Czech word "simak," which means "seller of fish" or "fish monger." This suggests that the name may have initially been an occupational surname, given to someone whose trade involved the selling of fish.
The name Simacek is a diminutive form of the Czech surname Simak, with the addition of the suffix "-ek," which was commonly used to indicate a smaller or lesser version of something. Therefore, the name Simacek likely referred to someone who was a smaller or less significant fish seller.
Some of the earliest recorded instances of the name Simacek can be found in various historical documents from the 16th and 17th centuries in the regions of Bohemia and Moravia, which were part of the Kingdom of Bohemia at the time. One notable example is Jan Simacek, a Czech philosopher and theologian who lived in the late 16th century and published several works on ethics and morality.
Another historically significant figure with the surname Simacek was Karel Simacek (1824-1886), a Czech politician and journalist who played a prominent role in the Czech National Revival movement, advocating for the preservation and promotion of Czech language and culture.
In the 18th century, the name Simacek appeared in various records from the town of Žatec, located in the northwestern part of the Czech Republic. One example is Václav Simacek (1745-1819), a Czech writer and educator who authored several textbooks and educational materials used in schools at the time.
The name Simacek can also be found in historical records from neighboring regions, such as Slovakia and parts of Germany, where it may have been adopted or modified over time due to migration and cultural exchanges.
Other notable individuals with the surname Simacek include Josef Simacek (1908-1979), a Czech painter and graphic artist known for his works depicting rural life and landscapes, and Petr Simacek (born 1976), a contemporary Czech writer and journalist who has published several novels and short story collections.
Demographics
Ancestry and ethnicity for Simacek
Among Census respondents with the surname Simacek, the largest self-reported group is White at 92.1%. The next largest groups are Hispanic (4.4%) and Two or More Races (1.8%).
The bar chart below shows how Simacek 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 Simacek surname at the time of the 2020 Census, not any inherent property of the name itself.
- White92.1% · 105
- Hispanic or Latino4.4% · 5
- Two or more races1.8% · 2
- Black or African American0.9% · 1
- Asian and Pacific Islander0.9% · 1
Timeline
Historical Census data for Simacek
Simacek 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
#147,253
National surname rank
Recorded bearers 112
+12 bearers (+12.0%)
Per 100,000 0.04
Rank movement Up 3,183 places
2020
#146,495
National surname rank
Recorded bearers 114
+2 bearers (+1.8%)
Per 100,000 0.04
Rank movement Up 758 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #150,436 | 100 | 0.04 | First available Census row | First available Census row |
| 2010 | #147,253 | 112 | 0.04 | +12 bearers (+12.0%) | Up 3,183 places |
| 2020 | #146,495 | 114 | 0.04 | +2 bearers (+1.8%) | Up 758 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 Simacek 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 | #147,253 | #146,495 | 0.5% |
| Count | 112 | 114 | 1.8% |
| Per 100K | 0.04 | 0.04 | -4.6% |
Between the 2010 and 2020 Census, the number of Simacek bearers went from 112 to 114 (+1.8% change). The surname moved up 758 positions in the national ranking, going from #147,253 to #146,495.
FAQ
Simacek surname: questions and answers
How many people in the U.S. have the surname Simacek?
Name Census estimates that about 131 living Americans carry the surname Simacek. Using the current population baseline, that works out to roughly 1 in 2,616,445 residents.
How common is Simacek?
Simacek ranks #146,495 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 114 people with the surname Simacek. That is different from the site's living-bearer estimate (131), 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 Simacek.
Has Simacek become more or less common over time?
Between 2010 and 2020, the surname Simacek went from 112 recorded bearers to 114. That is an increase of 2 (+1.8%). In the national ranking it rose from #147,253 to #146,495.
What does the Census say about the background of Simacek?
Among Census respondents with the surname Simacek, the largest self-reported group is White at 92.1%. The next largest groups are Hispanic (4.4%) 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 Simacek in the 2020 Census, accounting for 92.1% (105 people in the source table).
What is the full ancestry breakdown?
Simacek appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (92.1%), Hispanic (4.4%), 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 Simacek (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 Simacek mean?
An occupational surname derived from the Czech word meaning a sieve maker. 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 Simacek (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 are called Simacek?
You can see how many people have the last name Simacek on our sister site HowManyOfMe.org — same data roots, lighter UI.