2000
#10,438
National surname rank
Recorded bearers 2,827
First available Census row
Per 100,000 1.05
Rare Last name
Blazek
A habitational surname for someone from any of several places named Blažejov or Blažejovice in the Czech Republic.
According to the 2020 US Census Bureau surname tables, roughly 3,042 Americans carry the last name Blazek. That puts it at #11,363 in the national surname ranking, appearing at a frequency of 0.89 per 100,000 people (about 1 in 112,674 residents).
This page is the full Name Census profile for the Blazek 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
3.0K
1 in 112,674
Census rank
#11,363
2020 decennial data
Per 100,000
0.9
Frequency rate
Recorded bearers
2.7K
rare in the US
Popularity narrative
The Census Bureau recorded 2,653 bearers of the surname Blazek in its 2020 decennial surname file. At a rate of 0.89 per 100,000 residents, it holds the 11363rd position in the national surname ranking.
Among Census respondents with the surname Blazek, the largest self-reported group is White at 93.4%. The next largest groups are Hispanic (3.1%) and Two or More Races (2.5%).
Origin
Meaning and origin of Blazek
The surname BLAZEK is of Czech origin, and it is thought to have emerged around the 13th century in the regions that now make up the modern-day Czech Republic. The name is derived from the Czech word "blazek," which means "little fool" or "simpleton." It is believed that the surname was initially given as a nickname to someone who was perceived as being slightly foolish or simple-minded.
One of the earliest recorded instances of the surname BLAZEK can be found in a 14th-century manuscript from the town of Plzen, which was then part of the Kingdom of Bohemia. In this document, a man named Jan BLAZEK is mentioned as a landowner and farmer.
During the 15th century, the BLAZEK name began to spread beyond the Czech lands as people migrated to other parts of Europe. For instance, there are records of a family with the surname BLAZEK living in the town of Krakow, which was then part of the Kingdom of Poland.
One notable bearer of the BLAZEK surname was Vaclav BLAZEK, a Czech mathematician and astronomer who lived from 1490 to 1563. He was a professor at the University of Prague and made significant contributions to the study of celestial mechanics.
In the 17th century, a man named Jiri BLAZEK, born in 1612, was a prominent figure in the Czech Reformation movement. He was a Protestant minister and author who wrote several influential works on religious matters.
Another historical figure with the BLAZEK surname was Frantisek BLAZEK, a Czech composer and musician who lived from 1765 to 1848. He was known for his compositions for the church and was also a skilled organist.
During the 19th century, the BLAZEK name began to appear in various parts of Europe as people from the Czech lands emigrated to other countries. For example, there are records of a family with the surname BLAZEK settling in the town of Klagenfurt, which was then part of the Austro-Hungarian Empire.
One notable bearer of the BLAZEK surname from this period was Josef BLAZEK, a Czech writer and journalist who was born in 1832 and died in 1901. He was a prominent figure in the Czech nationalist movement and wrote extensively on issues related to Czech culture and identity.
Demographics
Ancestry and ethnicity for Blazek
Among Census respondents with the surname Blazek, the largest self-reported group is White at 93.4%. The next largest groups are Hispanic (3.1%) and Two or More Races (2.5%).
The bar chart below shows how Blazek 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 Blazek surname at the time of the 2020 Census, not any inherent property of the name itself.
- White93.4% · 2,479
- Hispanic or Latino3.1% · 81
- Two or more races2.5% · 67
- Asian and Pacific Islander0.5% · 14
- Black or African American0.2% · 6
- American Indian and Alaska Native0.2% · 6
Timeline
Historical Census data for Blazek
Blazek 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
#11,719
National surname rank
Recorded bearers 2,674
-153 bearers (-5.4%)
Per 100,000 0.91
Rank movement Down 1,281 places
2020
#11,363
National surname rank
Recorded bearers 2,653
-21 bearers (-0.8%)
Per 100,000 0.89
Rank movement Up 356 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #10,438 | 2,827 | 1.05 | First available Census row | First available Census row |
| 2010 | #11,719 | 2,674 | 0.91 | -153 bearers (-5.4%) | Down 1,281 places |
| 2020 | #11,363 | 2,653 | 0.89 | -21 bearers (-0.8%) | Up 356 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 Blazek 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 | #11,719 | #11,363 | 3.0% |
| Count | 2,674 | 2,653 | -0.8% |
| Per 100K | 0.91 | 0.89 | -2.5% |
Between the 2010 and 2020 Census, the number of Blazek bearers went from 2,674 to 2,653 (-0.8% change). The surname moved up 356 positions in the national ranking, going from #11,719 to #11,363.
FAQ
Blazek surname: questions and answers
How many people in the U.S. have the surname Blazek?
Name Census estimates that about 3,042 living Americans carry the surname Blazek. Using the current population baseline, that works out to roughly 1 in 112,674 residents.
How common is Blazek?
Blazek ranks #11,363 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 0.89 per 100,000 residents, which is about 1 people out of every 100,000.
How many people with this surname were counted in the Census?
The raw 2020 Census file counted 2,653 people with the surname Blazek. That is different from the site's living-bearer estimate (3,042), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.89 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.89 per 100,000 means that if you picked a random group of 100,000 U.S. residents, you would expect about 1 of them to have the surname Blazek.
Has Blazek become more or less common over time?
Between 2010 and 2020, the surname Blazek went from 2,674 recorded bearers to 2,653. That is a decrease of 21 (-0.8%). In the national ranking it rose from #11,719 to #11,363.
What does the Census say about the background of Blazek?
Among Census respondents with the surname Blazek, the largest self-reported group is White at 93.4%. The next largest groups are Hispanic (3.1%) and Two or More Races (2.5%). 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 Blazek in the 2020 Census, accounting for 93.4% (2,479 people in the source table).
What is the full ancestry breakdown?
Blazek appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (93.4%), Hispanic (3.1%), Two or More Races (2.5%). 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 Blazek (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 Blazek mean?
A habitational surname for someone from any of several places named Blažejov or Blažejovice in the Czech Republic. 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 Blazek (0.89 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 Blazek?
If you just want to know how many people are called Blazek, HowManyOfMe.org gives you the headline number in one glance.