2000
#12,070
National surname rank
Recorded bearers 2,372
First available Census row
Per 100,000 0.88
Rare Last name
Troiano
Derived from the name of the ancient city of Troia in Italy, likely referring to someone who came from there.
According to the 2020 US Census Bureau surname tables, roughly 2,572 Americans carry the last name Troiano. That puts it at #13,069 in the national surname ranking, appearing at a frequency of 0.75 per 100,000 people (about 1 in 133,264 residents).
This page is the full Name Census profile for the Troiano 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
2.6K
1 in 133,264
Census rank
#13,069
2020 decennial data
Per 100,000
0.8
Frequency rate
Recorded bearers
2.2K
rare in the US
Popularity narrative
The Census Bureau recorded 2,243 bearers of the surname Troiano in its 2020 decennial surname file. At a rate of 0.75 per 100,000 residents, it holds the 13069th position in the national surname ranking.
Among Census respondents with the surname Troiano, the largest self-reported group is White at 92.4%. The next largest groups are Hispanic (4.3%) and Two or More Races (1.8%).
Origin
Meaning and origin of Troiano
The surname Troiano originated in Italy, specifically in the regions of Campania and Lazio, dating back to the medieval period. It is believed to be derived from the ancient Roman city of Troia, which is now known as Trogir in modern-day Croatia. The name may have been adopted by individuals who either hailed from or resided in this area.
One of the earliest known records of the surname Troiano can be found in the Codex Diplomaticus Cavensis, a collection of medieval documents from the Monastery of Cava dei Tirreni in Campania. This collection contains references to individuals bearing the name Troiano as early as the 11th century.
In the 13th century, a notable figure named Troiano Bucca di Ranallo was a prominent jurist and statesman from the city of Naples. He served as a judge and ambassador for the Kingdom of Naples under the reign of King Charles I of Anjou.
During the Renaissance period, the Troiano family gained prominence in the arts and literature. Pietro Troiano, born in 1508 in Campagna, was a renowned poet and author who wrote works such as "Il Paradiso Terrestre" and "La Vita di Santi."
Another notable individual was Girolamo Troiano, born in 1516 in Naples. He was a skilled sculptor and architect who worked on various projects in Naples, including the design of the Church of Sant'Anna dei Lombardi.
In the 17th century, Giacomo Troiano, born in 1620 in Capua, was a respected physician and author of medical treatises. His work "De Morbis Epidemicis" was widely studied and influential in the field of medicine at the time.
As the surname Troiano spread throughout Italy and beyond, it underwent various spelling variations, such as Trojan, Trojan-Troiano, and Troiani. These variations can be found in historical records and documents from different regions.
While the surname Troiano has its roots in Italy, it has also been documented in other parts of Europe, potentially due to migration and intermarriage. However, the majority of historical records and notable figures associated with this surname trace back to its Italian origins.
Demographics
Ancestry and ethnicity for Troiano
Among Census respondents with the surname Troiano, the largest self-reported group is White at 92.4%. The next largest groups are Hispanic (4.3%) and Two or More Races (1.8%).
The bar chart below shows how Troiano 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 Troiano surname at the time of the 2020 Census, not any inherent property of the name itself.
- White92.4% · 2,073
- Hispanic or Latino4.3% · 97
- Two or more races1.8% · 41
- Asian and Pacific Islander0.6% · 14
- Black or African American0.6% · 13
- American Indian and Alaska Native0.2% · 5
Timeline
Historical Census data for Troiano
Troiano 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
#12,307
National surname rank
Recorded bearers 2,526
+154 bearers (+6.5%)
Per 100,000 0.86
Rank movement Down 237 places
2020
#13,069
National surname rank
Recorded bearers 2,243
-283 bearers (-11.2%)
Per 100,000 0.75
Rank movement Down 762 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #12,070 | 2,372 | 0.88 | First available Census row | First available Census row |
| 2010 | #12,307 | 2,526 | 0.86 | +154 bearers (+6.5%) | Down 237 places |
| 2020 | #13,069 | 2,243 | 0.75 | -283 bearers (-11.2%) | Down 762 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 Troiano 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 | #12,307 | #13,069 | -6.2% |
| Count | 2,526 | 2,243 | -11.2% |
| Per 100K | 0.86 | 0.75 | -12.7% |
Between the 2010 and 2020 Census, the number of Troiano bearers went from 2,526 to 2,243 (-11.2% change). The surname moved down 762 positions in the national ranking, going from #12,307 to #13,069.
FAQ
Troiano surname: questions and answers
How many people in the U.S. have the surname Troiano?
Name Census estimates that about 2,572 living Americans carry the surname Troiano. Using the current population baseline, that works out to roughly 1 in 133,264 residents.
How common is Troiano?
Troiano ranks #13,069 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 0.75 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 2,243 people with the surname Troiano. That is different from the site's living-bearer estimate (2,572), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.75 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.75 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 Troiano.
Has Troiano become more or less common over time?
Between 2010 and 2020, the surname Troiano went from 2,526 recorded bearers to 2,243. That is a decrease of 283 (-11.2%). In the national ranking it fell from #12,307 to #13,069.
What does the Census say about the background of Troiano?
Among Census respondents with the surname Troiano, the largest self-reported group is White at 92.4%. The next largest groups are Hispanic (4.3%) and Two or More Races (1.8%). 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 Troiano in the 2020 Census, accounting for 92.4% (2,073 people in the source table).
What is the full ancestry breakdown?
Troiano appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (92.4%), Hispanic (4.3%), Two or More Races (1.8%). 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 Troiano (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 Troiano mean?
Derived from the name of the ancient city of Troia in Italy, likely referring to someone who came from there. 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 Troiano (0.75 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 share the surname Troiano?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.