2000
#149,328
National surname rank
Recorded bearers 101
First available Census row
Per 100,000 0.04
Very Rare Last name
Treisch
A German surname derived from the word "dreisch" meaning thresher or thrashing floor.
According to the 2020 US Census Bureau surname tables, roughly 116 Americans carry the last name Treisch. That puts it at #155,270 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,954,779 residents).
This page is the full Name Census profile for the Treisch 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
116
1 in 2,954,779
Census rank
#155,270
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
101
very rare in the US
Popularity narrative
The Census Bureau recorded 101 bearers of the surname Treisch in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 155270th position in the national surname ranking.
Among Census respondents with the surname Treisch, the largest self-reported group is White at 99.0%. The next largest groups are Asian/Pacific Islander (1.0%).
Origin
Meaning and origin of Treisch
The surname Treisch is of German origin and dates back to the 16th century. It is believed to have originated in the regions of Bavaria and Swabia, where it was initially spelled as "Traisch" or "Treisch". The name is derived from the Middle High German word "treisach", which means a triangular plot of land or a triangular area.
Historically, the name Treisch was associated with landowners or individuals who resided on or owned triangular-shaped plots of land. Some of the earliest recorded instances of the name can be found in the tax records and land registries of Bavarian and Swabian towns and villages from the 1500s.
One notable mention of the name Treisch comes from the 17th century, when a certain Johann Treisch (1624-1691) was recorded as a prominent merchant and landowner in the city of Augsburg. His family's holdings and business dealings were documented in various municipal records of the time.
In the 18th century, the name Treisch can be traced to the village of Oberndorf, where a family by the name of Treisch was known for their expertise in brewing and tavern keeping. Heinrich Treisch (1712-1783) was a respected master brewer whose ales and lagers were celebrated throughout the region.
Another significant figure bearing the Treisch surname was Katharina Treisch (1788-1856), a writer and educator from the town of Memmingen. She was celebrated for her contributions to early childhood education and her published works on pedagogy.
As the Treisch family spread across Germany and into neighboring regions, the name underwent slight variations in spelling, such as "Treysch", "Traisch", and "Traysch". However, the core meaning and origin remained tied to the triangular plot of land.
Over the centuries, several other notable individuals have carried the Treisch surname, including the 19th-century artist Wilhelm Treisch (1825-1899), known for his landscapes and portraiture, and the 20th-century physicist Hans Treisch (1911-1989), who made significant contributions to the field of nuclear physics.
Demographics
Ancestry and ethnicity for Treisch
Among Census respondents with the surname Treisch, the largest self-reported group is White at 99.0%. The next largest groups are Asian/Pacific Islander (1.0%).
The bar chart below shows how Treisch 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 Treisch surname at the time of the 2020 Census, not any inherent property of the name itself.
- White99.0% · 100
- Asian and Pacific Islander1.0% · 1
Timeline
Historical Census data for Treisch
Treisch 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
+12 bearers (+11.9%)
Per 100,000 0.04
Rank movement Up 3,127 places
2020
#155,270
National surname rank
Recorded bearers 101
-12 bearers (-10.6%)
Per 100,000 0.03
Rank movement Down 9,069 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #149,328 | 101 | 0.04 | First available Census row | First available Census row |
| 2010 | #146,201 | 113 | 0.04 | +12 bearers (+11.9%) | Up 3,127 places |
| 2020 | #155,270 | 101 | 0.03 | -12 bearers (-10.6%) | Down 9,069 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 Treisch 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 | #155,270 | -6.2% |
| Count | 113 | 101 | -10.6% |
| Per 100K | 0.04 | 0.03 | -15.5% |
Between the 2010 and 2020 Census, the number of Treisch bearers went from 113 to 101 (-10.6% change). The surname moved down 9,069 positions in the national ranking, going from #146,201 to #155,270.
FAQ
Treisch surname: questions and answers
How many people in the U.S. have the surname Treisch?
Name Census estimates that about 116 living Americans carry the surname Treisch. Using the current population baseline, that works out to roughly 1 in 2,954,779 residents.
How common is Treisch?
Treisch ranks #155,270 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.03 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 101 people with the surname Treisch. That is different from the site's living-bearer estimate (116), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.03 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.03 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 Treisch.
Has Treisch become more or less common over time?
Between 2010 and 2020, the surname Treisch went from 113 recorded bearers to 101. That is a decrease of 12 (-10.6%). In the national ranking it fell from #146,201 to #155,270.
What does the Census say about the background of Treisch?
Among Census respondents with the surname Treisch, the largest self-reported group is White at 99.0%. The next largest groups are Asian/Pacific Islander (1.0%). 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 Treisch in the 2020 Census, accounting for 99.0% (100 people in the source table).
What is the full ancestry breakdown?
Treisch appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (99.0%), Asian/Pacific Islander (1.0%). 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 Treisch (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 Treisch mean?
A German surname derived from the word "dreisch" meaning thresher or thrashing floor. 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 Treisch (0.03 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 Treisch?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.