2010
#149,395
National surname rank
Recorded bearers 110
First available Census row
Per 100,000 0.04
Very Rare Last name
Marosek
A surname of Czech origin meaning "little Mars" or possibly referring to someone from Mars.
According to the 2020 US Census Bureau surname tables, roughly 123 Americans carry the last name Marosek. That puts it at #151,639 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,786,621 residents).
This page is the full Name Census profile for the Marosek 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
123
1 in 2,786,621
Census rank
#151,639
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
107
very rare in the US
Popularity narrative
The Census Bureau recorded 107 bearers of the surname Marosek in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 151639th position in the national surname ranking.
Among Census respondents with the surname Marosek, the largest self-reported group is White at 89.7%. The next largest groups are Two or More Races (8.4%) and Hispanic (0.9%).
Origin
Meaning and origin of Marosek
The surname MAROSEK is of Czech origin, originating in the region of Bohemia in the present-day Czech Republic. It is believed to have emerged in the late 15th or early 16th century. The name is derived from the Czech word "maroš," which refers to a type of meadow grass or hay. It is likely that the surname was initially given to someone who lived near or worked with this type of grass or hay.
One of the earliest recorded instances of the surname MAROSEK can be found in the records of the town of Litomerice, located in the northern part of Bohemia. A document from 1524 mentions a certain Jan Marosek, who was a farmer in the area. This suggests that the name was already well-established by that time.
During the 16th and 17th centuries, the MAROSEK surname was prevalent in various parts of Bohemia, particularly in the regions around the cities of Prague and Pilsen. It is possible that some bearers of the name were engaged in agricultural activities related to the cultivation of hay or meadow grass.
In the 18th century, the name appears in the records of the village of Chyše, located in the western part of Bohemia. A document from 1723 mentions a Matěj Marosek, who was a landowner in the village. This indicates that some members of the MAROSEK family had achieved a degree of prosperity and owned land during that period.
One notable bearer of the surname MAROSEK was Jan Marosek (1721-1789), a Czech painter and engraver who was active in the late 18th century. He is known for his religious paintings and engravings, some of which can still be found in churches and galleries in the Czech Republic.
Another individual of note was Karel Marosek (1804-1879), a Czech writer and journalist who lived in the 19th century. He was a prominent figure in the Czech National Revival movement and contributed to the promotion of the Czech language and culture.
In the 20th century, Jaroslav Marosek (1912-1994) was a Czech composer and conductor who gained recognition for his orchestral and choral works. He served as the principal conductor of the Prague Symphony Orchestra for several years.
While the surname MAROSEK is not as common as some other Czech surnames, it has a long and interesting history that spans several centuries. It has been borne by individuals from various walks of life, including farmers, landowners, artists, writers, and musicians.
Demographics
Ancestry and ethnicity for Marosek
Among Census respondents with the surname Marosek, the largest self-reported group is White at 89.7%. The next largest groups are Two or More Races (8.4%) and Hispanic (0.9%).
The bar chart below shows how Marosek 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 Marosek surname at the time of the 2020 Census, not any inherent property of the name itself.
- White89.7% · 96
- Two or more races8.4% · 9
- Hispanic or Latino0.9% · 1
- Asian and Pacific Islander0.9% · 1
Timeline
Historical Census data for Marosek
Marosek 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
#151,639
National surname rank
Recorded bearers 107
-3 bearers (-2.7%)
Per 100,000 0.04
Rank movement Down 2,244 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #149,395 | 110 | 0.04 | First available Census row | First available Census row |
| 2020 | #151,639 | 107 | 0.04 | -3 bearers (-2.7%) | Down 2,244 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 Marosek 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 | #149,395 | #151,639 | -1.5% |
| Count | 110 | 107 | -2.7% |
| Per 100K | 0.04 | 0.04 | -10.5% |
Between the 2010 and 2020 Census, the number of Marosek bearers went from 110 to 107 (-2.7% change). The surname moved down 2,244 positions in the national ranking, going from #149,395 to #151,639.
FAQ
Marosek surname: questions and answers
How many people in the U.S. have the surname Marosek?
Name Census estimates that about 123 living Americans carry the surname Marosek. Using the current population baseline, that works out to roughly 1 in 2,786,621 residents.
How common is Marosek?
Marosek ranks #151,639 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 107 people with the surname Marosek. That is different from the site's living-bearer estimate (123), 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 Marosek.
Has Marosek become more or less common over time?
Between 2010 and 2020, the surname Marosek went from 110 recorded bearers to 107. That is a decrease of 3 (-2.7%). In the national ranking it fell from #149,395 to #151,639.
What does the Census say about the background of Marosek?
Among Census respondents with the surname Marosek, the largest self-reported group is White at 89.7%. The next largest groups are Two or More Races (8.4%) 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 Marosek in the 2020 Census, accounting for 89.7% (96 people in the source table).
What is the full ancestry breakdown?
Marosek appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (89.7%), Two or More Races (8.4%), 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 Marosek (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 Marosek mean?
A surname of Czech origin meaning "little Mars" or possibly referring to someone from Mars. 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 Marosek (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 Americans have the surname Marosek?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.