2000
#12,811
National surname rank
Recorded bearers 2,205
First available Census row
Per 100,000 0.82
Rare Last name
Mraz
A Czech and Slovak occupational surname derived from the word "mráz," meaning "frost" or "freezing weather."
According to the 2020 US Census Bureau surname tables, roughly 2,368 Americans carry the last name Mraz. That puts it at #13,983 in the national surname ranking, appearing at a frequency of 0.69 per 100,000 people (about 1 in 144,744 residents).
This page is the full Name Census profile for the Mraz 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
2.4K
1 in 144,744
Census rank
#13,983
2020 decennial data
Per 100,000
0.7
Frequency rate
Recorded bearers
2.1K
rare in the US
Popularity narrative
The Census Bureau recorded 2,065 bearers of the surname Mraz in its 2020 decennial surname file. At a rate of 0.69 per 100,000 residents, it holds the 13983rd position in the national surname ranking.
Among Census respondents with the surname Mraz, the largest self-reported group is White at 91.7%. The next largest groups are Hispanic (3.7%) and Two or More Races (2.9%).
Origin
Meaning and origin of Mraz
The surname MRAZ has its origins in the Czech Republic, dating back to the 13th century. It is derived from the Slavic word "mraz," which means "frost" or "cold." This suggests that the name may have initially been given as a descriptive nickname for someone living in a cold or frosty region.
MRAZ is believed to have first appeared in the historical records of Bohemia, a region in the modern-day Czech Republic. One of the earliest documented instances of the name can be found in a land registry from the village of Chodov, dated 1287. The entry refers to a peasant farmer named Mraz, who owned a small plot of land in the village.
During the Middle Ages, the MRAZ surname was primarily associated with rural communities and agricultural families. However, as time passed, the name spread to other parts of the Czech lands, including Moravia and Silesia.
In the 16th century, a notable figure bearing the MRAZ surname was Jan Mraz, a Protestant reformer who played a significant role in the Bohemian Reformation movement. He was born in 1522 in the town of Litomerice and worked closely with the renowned theologian Jan Hus.
Another historical figure of note was Vaclav Mraz, a Czech composer and musician who lived in the late 18th century. Born in 1759 in Prague, he composed several operas and orchestral works that were performed in the city's theaters and concert halls.
During the 19th century, the MRAZ surname gained prominence in the field of literature. Jaroslav Mraz, born in 1832 in Brno, was a celebrated poet and writer who contributed to the Czech literary renaissance. His works often explored themes of national identity and the struggle for cultural preservation.
In the early 20th century, Frantisek Mraz, a renowned Czech artist, made significant contributions to the development of modern art. Born in 1891 in Prague, his paintings and sculptures were heavily influenced by Cubism and Expressionism, and his works are featured in numerous art galleries and museums across Europe.
While the MRAZ surname has its roots in the Czech Republic, it has since spread to other parts of the world, particularly through migration and immigration patterns. However, its rich historical ties to the Bohemian region and its associations with notable figures in various fields remain an integral part of its cultural significance.
Demographics
Ancestry and ethnicity for Mraz
Among Census respondents with the surname Mraz, the largest self-reported group is White at 91.7%. The next largest groups are Hispanic (3.7%) and Two or More Races (2.9%).
The bar chart below shows how Mraz 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 Mraz surname at the time of the 2020 Census, not any inherent property of the name itself.
- White91.7% · 1,894
- Hispanic or Latino3.7% · 77
- Two or more races2.9% · 60
- Asian and Pacific Islander0.7% · 14
- American Indian and Alaska Native0.6% · 12
- Black or African American0.4% · 8
Timeline
Historical Census data for Mraz
Mraz 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
#14,014
National surname rank
Recorded bearers 2,149
-56 bearers (-2.5%)
Per 100,000 0.73
Rank movement Down 1,203 places
2020
#13,983
National surname rank
Recorded bearers 2,065
-84 bearers (-3.9%)
Per 100,000 0.69
Rank movement Up 31 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #12,811 | 2,205 | 0.82 | First available Census row | First available Census row |
| 2010 | #14,014 | 2,149 | 0.73 | -56 bearers (-2.5%) | Down 1,203 places |
| 2020 | #13,983 | 2,065 | 0.69 | -84 bearers (-3.9%) | Up 31 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 Mraz 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 | #14,014 | #13,983 | 0.2% |
| Count | 2,149 | 2,065 | -3.9% |
| Per 100K | 0.73 | 0.69 | -5.4% |
Between the 2010 and 2020 Census, the number of Mraz bearers went from 2,149 to 2,065 (-3.9% change). The surname moved up 31 positions in the national ranking, going from #14,014 to #13,983.
Notable bearers
Famous people with the surname Mraz
FAQ
Mraz surname: questions and answers
How many people in the U.S. have the surname Mraz?
Name Census estimates that about 2,368 living Americans carry the surname Mraz. Using the current population baseline, that works out to roughly 1 in 144,744 residents.
How common is Mraz?
Mraz ranks #13,983 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 0.69 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 2,065 people with the surname Mraz. That is different from the site's living-bearer estimate (2,368), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.69 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.69 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 Mraz.
Has Mraz become more or less common over time?
Between 2010 and 2020, the surname Mraz went from 2,149 recorded bearers to 2,065. That is a decrease of 84 (-3.9%). In the national ranking it rose from #14,014 to #13,983.
What does the Census say about the background of Mraz?
Among Census respondents with the surname Mraz, the largest self-reported group is White at 91.7%. The next largest groups are Hispanic (3.7%) and Two or More Races (2.9%). 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 Mraz in the 2020 Census, accounting for 91.7% (1,894 people in the source table).
What is the full ancestry breakdown?
Mraz appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (91.7%), Hispanic (3.7%), Two or More Races (2.9%). 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 Mraz (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 Mraz mean?
A Czech and Slovak occupational surname derived from the word "mráz," meaning "frost" or "freezing weather." 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 Mraz (0.69 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 Mraz?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.