2000
#96,480
National surname rank
Recorded bearers 175
First available Census row
Per 100,000 0.06
Very Rare Last name
Rainosek
A surname likely of Czech origin meaning "little rain" or "light rain".
According to the 2020 US Census Bureau surname tables, roughly 233 Americans carry the last name Rainosek. That puts it at #96,193 in the national surname ranking, appearing at a frequency of 0.07 per 100,000 people (about 1 in 1,471,049 residents).
This page is the full Name Census profile for the Rainosek 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
233
1 in 1,471,049
Census rank
#96,193
2020 decennial data
Per 100,000
0.1
Frequency rate
Recorded bearers
203
very rare in the US
Popularity narrative
The Census Bureau recorded 203 bearers of the surname Rainosek in its 2020 decennial surname file. At a rate of 0.07 per 100,000 residents, it holds the 96193rd position in the national surname ranking.
Among Census respondents with the surname Rainosek, the largest self-reported group is White at 85.2%. The next largest groups are Hispanic (8.9%) and Two or More Races (3.4%).
Origin
Meaning and origin of Rainosek
The surname Rainosek has its origins in the Czech Republic, dating back to the 16th century. It is believed to have derived from the Old Czech word "raina," which means "field" or "meadow," suggesting that the name was originally associated with people who lived or worked in agricultural areas.
One of the earliest recorded instances of the name Rainosek can be found in the records of the town of Kutná Hora, where a man named Jan Rainosek was mentioned in a document from the year 1589. This document was a record of land ownership and taxation, indicating that the Rainosek family may have been landowners or farmers during that time.
In the 17th century, the name Rainosek appeared in various church records and registers across Bohemia, which was then part of the Holy Roman Empire. One notable individual from this period was Vavřinec Rainosek, a blacksmith who lived in the village of Žlutice between 1645 and 1701.
During the 18th century, the Rainosek surname spread to other regions of the Habsburg Monarchy, including Moravia and Austrian Silesia. In 1724, a man named František Rainosek was recorded as a merchant in the city of Brno, indicating that the family had also established itself in urban areas and may have been involved in trade.
As the 19th century dawned, the Rainosek name continued to be present in various records across the Czech lands. One prominent individual was Josef Rainosek (1810-1878), a teacher and writer from the town of Litomyšl, who authored several educational texts and works of fiction.
In the late 19th and early 20th centuries, the Rainosek surname began to appear in other parts of Europe and the world as individuals emigrated from their ancestral homeland. For instance, Jan Rainosek (1865-1932) was a Czech-American immigrant who settled in Chicago and worked as a carpenter, while Alois Rainosek (1889-1957) was a Czech-born musician who gained fame in Vienna as a conductor and composer.
Throughout its history, the Rainosek surname has been associated with various professions and social classes, from farmers and tradesmen to academics and artists. While its origins can be traced back to the Czech Republic, the name has since spread to other parts of the world, carried by individuals who sought new opportunities or were displaced by wars and upheavals.
Demographics
Ancestry and ethnicity for Rainosek
Among Census respondents with the surname Rainosek, the largest self-reported group is White at 85.2%. The next largest groups are Hispanic (8.9%) and Two or More Races (3.4%).
The bar chart below shows how Rainosek 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 Rainosek surname at the time of the 2020 Census, not any inherent property of the name itself.
- White85.2% · 173
- Hispanic or Latino8.9% · 18
- Two or more races3.4% · 7
- Asian and Pacific Islander1.5% · 3
- Black or African American1.0% · 2
Timeline
Historical Census data for Rainosek
Rainosek 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
#90,495
National surname rank
Recorded bearers 204
+29 bearers (+16.6%)
Per 100,000 0.07
Rank movement Up 5,985 places
2020
#96,193
National surname rank
Recorded bearers 203
-1 bearers (-0.5%)
Per 100,000 0.07
Rank movement Down 5,698 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #96,480 | 175 | 0.06 | First available Census row | First available Census row |
| 2010 | #90,495 | 204 | 0.07 | +29 bearers (+16.6%) | Up 5,985 places |
| 2020 | #96,193 | 203 | 0.07 | -1 bearers (-0.5%) | Down 5,698 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 Rainosek 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 | #90,495 | #96,193 | -6.3% |
| Count | 204 | 203 | -0.5% |
| Per 100K | 0.07 | 0.07 | -3.0% |
Between the 2010 and 2020 Census, the number of Rainosek bearers went from 204 to 203 (-0.5% change). The surname moved down 5,698 positions in the national ranking, going from #90,495 to #96,193.
FAQ
Rainosek surname: questions and answers
How many people in the U.S. have the surname Rainosek?
Name Census estimates that about 233 living Americans carry the surname Rainosek. Using the current population baseline, that works out to roughly 1 in 1,471,049 residents.
How common is Rainosek?
Rainosek ranks #96,193 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.07 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 203 people with the surname Rainosek. That is different from the site's living-bearer estimate (233), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.07 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.07 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 Rainosek.
Has Rainosek become more or less common over time?
Between 2010 and 2020, the surname Rainosek went from 204 recorded bearers to 203. That is a decrease of 1 (-0.5%). In the national ranking it fell from #90,495 to #96,193.
What does the Census say about the background of Rainosek?
Among Census respondents with the surname Rainosek, the largest self-reported group is White at 85.2%. The next largest groups are Hispanic (8.9%) and Two or More Races (3.4%). 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 Rainosek in the 2020 Census, accounting for 85.2% (173 people in the source table).
What is the full ancestry breakdown?
Rainosek appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (85.2%), Hispanic (8.9%), Two or More Races (3.4%). 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 Rainosek (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 Rainosek mean?
A surname likely of Czech origin meaning "little rain" or "light rain". 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 Rainosek (0.07 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 Rainosek?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.