2000
#39,617
National surname rank
Recorded bearers 522
First available Census row
Per 100,000 0.19
Very Rare Last name
Troha
An occupational surname derived from the Slovak word trohár, meaning thresher or miller.
According to the 2020 US Census Bureau surname tables, roughly 615 Americans carry the last name Troha. That puts it at #43,428 in the national surname ranking, appearing at a frequency of 0.18 per 100,000 people (about 1 in 557,324 residents).
This page is the full Name Census profile for the Troha 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
615
1 in 557,324
Census rank
#43,428
2020 decennial data
Per 100,000
0.2
Frequency rate
Recorded bearers
536
very rare in the US
Popularity narrative
The Census Bureau recorded 536 bearers of the surname Troha in its 2020 decennial surname file. At a rate of 0.18 per 100,000 residents, it holds the 43428th position in the national surname ranking.
Among Census respondents with the surname Troha, the largest self-reported group is White at 95.1%. The next largest groups are Two or More Races (2.1%) and Hispanic (1.9%).
Origin
Meaning and origin of Troha
The surname Troha originates from the Slovenian region in Central Europe, dating back to the late 15th century. It is believed to be derived from the Slovenian word "troh," which means "trunk" or "log," possibly indicating an association with forestry or woodworking occupations.
One of the earliest recorded instances of the Troha surname can be found in the parish records of the town of Ribnica, Slovenia, in the late 1400s. The name is also documented in various historical records from the region, including land registries and tax documents from the 16th and 17th centuries.
During the 16th century, the Troha name appeared in several Slovenian manuscripts and chronicles, suggesting that the family held a notable position within the local community. One such reference is found in the "Codex Urbariorum," a collection of land records from the Duchy of Carniola, which mentions a certain Peter Troha as a landowner in the village of Dolenja vas in 1576.
In the 18th century, the Troha family is mentioned in connection with the town of Cerknica, where they were involved in the local woodworking industry. A prominent figure from this period was Janez Troha (1721-1798), a master carpenter renowned for his intricate wood carvings and furniture designs.
As the Troha name spread beyond Slovenia, it was occasionally adapted to different linguistic variations, such as Trochar in Croatian regions and Troha in parts of Austria. One notable bearer of the name was Karl Troha (1846-1919), an Austrian politician and lawyer who served as a member of the Reichsrat, the Imperial Council of Austria-Hungary.
Another individual of note was Andrej Troha (1892-1971), a Slovenian writer and poet who contributed significantly to the development of Slovenian literature in the early 20th century. His works often explored themes of rural life and the natural beauty of the Slovenian countryside.
Lastly, a more recent figure was Tone Troha (1925-2004), a Slovenian artist and sculptor known for his abstract metal sculptures and public art installations. His works can be found in various cities across Slovenia and other parts of Europe.
Demographics
Ancestry and ethnicity for Troha
Among Census respondents with the surname Troha, the largest self-reported group is White at 95.1%. The next largest groups are Two or More Races (2.1%) and Hispanic (1.9%).
The bar chart below shows how Troha 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 Troha surname at the time of the 2020 Census, not any inherent property of the name itself.
- White95.1% · 510
- Two or more races2.1% · 11
- Hispanic or Latino1.9% · 10
- Asian and Pacific Islander0.4% · 2
- American Indian and Alaska Native0.4% · 2
- Black or African American0.2% · 1
Timeline
Historical Census data for Troha
Troha 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
#41,038
National surname rank
Recorded bearers 531
+9 bearers (+1.7%)
Per 100,000 0.18
Rank movement Down 1,421 places
2020
#43,428
National surname rank
Recorded bearers 536
+5 bearers (+0.9%)
Per 100,000 0.18
Rank movement Down 2,390 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #39,617 | 522 | 0.19 | First available Census row | First available Census row |
| 2010 | #41,038 | 531 | 0.18 | +9 bearers (+1.7%) | Down 1,421 places |
| 2020 | #43,428 | 536 | 0.18 | +5 bearers (+0.9%) | Down 2,390 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 Troha 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 | #41,038 | #43,428 | -5.8% |
| Count | 531 | 536 | 0.9% |
| Per 100K | 0.18 | 0.18 | -0.4% |
Between the 2010 and 2020 Census, the number of Troha bearers went from 531 to 536 (+0.9% change). The surname moved down 2,390 positions in the national ranking, going from #41,038 to #43,428.
FAQ
Troha surname: questions and answers
How many people in the U.S. have the surname Troha?
Name Census estimates that about 615 living Americans carry the surname Troha. Using the current population baseline, that works out to roughly 1 in 557,324 residents.
How common is Troha?
Troha ranks #43,428 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.18 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 536 people with the surname Troha. That is different from the site's living-bearer estimate (615), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.18 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.18 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 Troha.
Has Troha become more or less common over time?
Between 2010 and 2020, the surname Troha went from 531 recorded bearers to 536. That is an increase of 5 (+0.9%). In the national ranking it fell from #41,038 to #43,428.
What does the Census say about the background of Troha?
Among Census respondents with the surname Troha, the largest self-reported group is White at 95.1%. The next largest groups are Two or More Races (2.1%) and Hispanic (1.9%). 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 Troha in the 2020 Census, accounting for 95.1% (510 people in the source table).
What is the full ancestry breakdown?
Troha appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (95.1%), Two or More Races (2.1%), Hispanic (1.9%). 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 Troha (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 Troha mean?
An occupational surname derived from the Slovak word trohár, meaning thresher or miller. 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 Troha (0.18 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 Troha?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.