2000
#128,797
National surname rank
Recorded bearers 122
First available Census row
Per 100,000 0.05
Very Rare Last name
Kmoch
A surname derived from the Czech word "kmoch," meaning godfather or sponsor.
According to the 2020 US Census Bureau surname tables, roughly 136 Americans carry the last name Kmoch. That puts it at #142,788 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,520,252 residents).
This page is the full Name Census profile for the Kmoch 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
136
1 in 2,520,252
Census rank
#142,788
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
119
very rare in the US
Popularity narrative
The Census Bureau recorded 119 bearers of the surname Kmoch in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 142788th position in the national surname ranking.
Among Census respondents with the surname Kmoch, the largest self-reported group is White at 91.6%. The next largest groups are Hispanic (3.4%) and Black (1.7%).
Origin
Meaning and origin of Kmoch
The surname KMOCH has its origins in the Czech Republic, dating back to the 14th century. It is believed to be derived from the Czech word "kmoch," which means "a grumpy or gruff person." This nickname may have been given to someone with a stern or serious demeanor, and it eventually became a hereditary surname.
The earliest recorded instance of the surname KMOCH can be found in the Moravian Land Records, which date back to the late 14th century. These records mention a certain Jakub Kmoch, who was a landowner in the region of Moravia, now part of the Czech Republic.
In the 16th century, the name KMOCH appeared in the Libri Erectionum, a collection of documents related to the establishment of new towns and villages in the Kingdom of Bohemia. This suggests that people bearing this surname played a role in the development of settlements during that period.
One notable individual with the surname KMOCH was Jan Kmoch (1602-1679), a Czech composer and organist who served at the Church of St. Vitus in Prague. His compositions, primarily sacred works, were highly regarded during his lifetime and contributed to the rich musical tradition of the region.
In the 18th century, the name KMOCH appeared in the records of the town of Kutná Hora, which was a significant center of silver mining in Bohemia. A certain František Kmoch (1720-1798) was a prominent mine owner and businessman in the area.
Another individual of note was Karel Kmoch (1824-1897), a Czech writer and journalist who played a significant role in the Czech National Revival movement. He wrote extensively on topics related to Czech history, culture, and language, and his works helped to promote Czech national identity during a period of political and cultural oppression.
Throughout its history, the surname KMOCH has been associated with various place names and locations within the Czech Republic. For example, the village of Kmochův Mlýn (literally "Kmoch's Mill") is named after a former mill owner with the surname KMOCH.
While the surname KMOCH is predominantly found in the Czech Republic, it has also spread to other parts of the world through migration and immigration. However, its roots can be traced back to the historical regions of Bohemia and Moravia, where it has a rich and varied history spanning several centuries.
Demographics
Ancestry and ethnicity for Kmoch
Among Census respondents with the surname Kmoch, the largest self-reported group is White at 91.6%. The next largest groups are Hispanic (3.4%) and Black (1.7%).
The bar chart below shows how Kmoch 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 Kmoch surname at the time of the 2020 Census, not any inherent property of the name itself.
- White91.6% · 109
- Hispanic or Latino3.4% · 4
- Black or African American1.7% · 2
- Asian and Pacific Islander1.7% · 2
- American Indian and Alaska Native0.8% · 1
- Two or more races0.8% · 1
Timeline
Historical Census data for Kmoch
Kmoch 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
#146,201
National surname rank
Recorded bearers 113
-9 bearers (-7.4%)
Per 100,000 0.04
Rank movement Down 17,404 places
2020
#142,788
National surname rank
Recorded bearers 119
+6 bearers (+5.3%)
Per 100,000 0.04
Rank movement Up 3,413 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #128,797 | 122 | 0.05 | First available Census row | First available Census row |
| 2010 | #146,201 | 113 | 0.04 | -9 bearers (-7.4%) | Down 17,404 places |
| 2020 | #142,788 | 119 | 0.04 | +6 bearers (+5.3%) | Up 3,413 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 Kmoch 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 | #146,201 | #142,788 | 2.3% |
| Count | 113 | 119 | 5.3% |
| Per 100K | 0.04 | 0.04 | -0.5% |
Between the 2010 and 2020 Census, the number of Kmoch bearers went from 113 to 119 (+5.3% change). The surname moved up 3,413 positions in the national ranking, going from #146,201 to #142,788.
FAQ
Kmoch surname: questions and answers
How many people in the U.S. have the surname Kmoch?
Name Census estimates that about 136 living Americans carry the surname Kmoch. Using the current population baseline, that works out to roughly 1 in 2,520,252 residents.
How common is Kmoch?
Kmoch ranks #142,788 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 119 people with the surname Kmoch. That is different from the site's living-bearer estimate (136), 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 Kmoch.
Has Kmoch become more or less common over time?
Between 2010 and 2020, the surname Kmoch went from 113 recorded bearers to 119. That is an increase of 6 (+5.3%). In the national ranking it rose from #146,201 to #142,788.
What does the Census say about the background of Kmoch?
Among Census respondents with the surname Kmoch, the largest self-reported group is White at 91.6%. The next largest groups are Hispanic (3.4%) and Black (1.7%). 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 Kmoch in the 2020 Census, accounting for 91.6% (109 people in the source table).
What is the full ancestry breakdown?
Kmoch appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (91.6%), Hispanic (3.4%), Black (1.7%). 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 Kmoch (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 Kmoch mean?
A surname derived from the Czech word "kmoch," meaning godfather or sponsor. 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 Kmoch (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 have the surname Kmoch?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.