2000
#36,129
National surname rank
Recorded bearers 586
First available Census row
Per 100,000 0.22
Very Rare Last name
Trias
A locational surname derived from a place name in Catalonia, Spain.
According to the 2020 US Census Bureau surname tables, roughly 952 Americans carry the last name Trias. That puts it at #30,199 in the national surname ranking, appearing at a frequency of 0.28 per 100,000 people (about 1 in 360,036 residents).
This page is the full Name Census profile for the Trias 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
952
1 in 360,036
Census rank
#30,199
2020 decennial data
Per 100,000
0.3
Frequency rate
Recorded bearers
830
very rare in the US
Popularity narrative
The Census Bureau recorded 830 bearers of the surname Trias in its 2020 decennial surname file. At a rate of 0.28 per 100,000 residents, it holds the 30199th position in the national surname ranking.
Among Census respondents with the surname Trias, the largest self-reported group is Asian/Pacific Islander at 53.3%. The next largest groups are Hispanic (30.6%) and White (11.0%).
Origin
Meaning and origin of Trias
The surname Trias has its origins in Spain, dating back to the 15th century or possibly earlier. It is believed to be derived from the Latin word "triticum," meaning wheat or grain. This suggests that the name may have originally been associated with those involved in agriculture, particularly the cultivation of wheat or other grains.
In Spain, the surname Trias was primarily concentrated in the region of Catalonia, particularly in the provinces of Barcelona and Girona. It is possible that the name evolved from a place name or a descriptive nickname referring to someone who lived near a wheat field or worked with grain.
One of the earliest recorded references to the surname Trias can be found in a document from the city of Barcelona, dated 1487. This document mentions a certain Jaume Trias, who was a merchant engaged in the trade of grain and other agricultural products.
Another notable historical figure bearing the surname Trias was Francesc Trias i Giro (1760-1812), a Catalan physician and botanist. He made significant contributions to the study of medicinal plants and was a member of the Royal Academy of Natural Sciences and Arts of Barcelona.
In the 19th century, Josep Trias i Colomer (1821-1898) was a prominent Catalan lawyer and politician. He served as a member of the Spanish Parliament and played a role in the political movements of the time.
The surname Trias also has a presence in the literary world. Antoni Trias i Ros (1900-1971) was a Catalan poet and writer known for his works that explored the themes of nature, love, and the Catalan identity.
Another notable figure was Miquel Trias Peitx (1839-1914), a Catalan engineer and architect. He designed several important buildings in Barcelona, including the iconic Palau de la Música Catalana, a UNESCO World Heritage Site.
While the surname Trias has its roots in Spain, particularly in the region of Catalonia, it has since spread to other parts of the world through migration and cultural exchange. However, its historical origins and associations with agriculture and wheat cultivation remain an integral part of its legacy.
Demographics
Ancestry and ethnicity for Trias
Among Census respondents with the surname Trias, the largest self-reported group is Asian/Pacific Islander at 53.3%. The next largest groups are Hispanic (30.6%) and White (11.0%).
The bar chart below shows how Trias 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 Trias surname at the time of the 2020 Census, not any inherent property of the name itself.
- Asian and Pacific Islander53.3% · 442
- Hispanic or Latino30.6% · 254
- White11.0% · 91
- Two or more races4.5% · 37
- Black or African American0.7% · 6
Timeline
Historical Census data for Trias
Trias 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
#35,537
National surname rank
Recorded bearers 633
+47 bearers (+8.0%)
Per 100,000 0.21
Rank movement Up 592 places
2020
#30,199
National surname rank
Recorded bearers 830
+197 bearers (+31.1%)
Per 100,000 0.28
Rank movement Up 5,338 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #36,129 | 586 | 0.22 | First available Census row | First available Census row |
| 2010 | #35,537 | 633 | 0.21 | +47 bearers (+8.0%) | Up 592 places |
| 2020 | #30,199 | 830 | 0.28 | +197 bearers (+31.1%) | Up 5,338 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 Trias 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 | #35,537 | #30,199 | 15.0% |
| Count | 633 | 830 | 31.1% |
| Per 100K | 0.21 | 0.28 | 32.2% |
Between the 2010 and 2020 Census, the number of Trias bearers went from 633 to 830 (+31.1% change). The surname moved up 5,338 positions in the national ranking, going from #35,537 to #30,199.
FAQ
Trias surname: questions and answers
How many people in the U.S. have the surname Trias?
Name Census estimates that about 952 living Americans carry the surname Trias. Using the current population baseline, that works out to roughly 1 in 360,036 residents.
How common is Trias?
Trias ranks #30,199 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.28 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 830 people with the surname Trias. That is different from the site's living-bearer estimate (952), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.28 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.28 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 Trias.
Has Trias become more or less common over time?
Between 2010 and 2020, the surname Trias went from 633 recorded bearers to 830. That is an increase of 197 (+31.1%). In the national ranking it rose from #35,537 to #30,199.
What does the Census say about the background of Trias?
Among Census respondents with the surname Trias, the largest self-reported group is Asian/Pacific Islander at 53.3%. The next largest groups are Hispanic (30.6%) and White (11.0%). 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?
Asian/Pacific Islander is the largest self-reported group for the surname Trias in the 2020 Census, accounting for 53.3% (442 people in the source table).
What is the full ancestry breakdown?
Trias appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Asian/Pacific Islander (53.3%), Hispanic (30.6%), White (11.0%). 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 Trias (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 Trias mean?
A locational surname derived from a place name in Catalonia, Spain. 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 Trias (0.28 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 last name Trias?
For a quick modern take, check how many people are called Trias on our sister site HowManyOfMe.org.