2000
#144,908
National surname rank
Recorded bearers 105
First available Census row
Per 100,000 0.04
Very Rare Last name
Depiazza
Of Italian origin, meaning "from the piazza" or "from the town square".
According to the 2020 US Census Bureau surname tables, roughly 117 Americans carry the last name Depiazza. That puts it at #154,755 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,929,524 residents).
This page is the full Name Census profile for the Depiazza 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
117
1 in 2,929,524
Census rank
#154,755
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
102
very rare in the US
Popularity narrative
The Census Bureau recorded 102 bearers of the surname Depiazza in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 154755th position in the national surname ranking.
Among Census respondents with the surname Depiazza, the largest self-reported group is White at 87.3%. The next largest groups are Hispanic (8.8%) and Two or More Races (2.9%).
Origin
Meaning and origin of Depiazza
The surname DEPIAZZA originated in Italy, with its earliest known records dating back to the 14th century. It is believed to have derived from the Italian words "di" meaning "from" and "piazza" referring to a town square or public space. This suggests that the name may have originated from an individual or family who resided near or around a prominent piazza in a particular Italian town or city.
One of the earliest recorded instances of the DEPIAZZA surname can be found in the archives of Genoa, where a family by this name was documented as residing in the city during the late 1300s. Historical records also indicate that the DEPIAZZA name was present in other regions of northern Italy, such as Piedmont and Lombardy, during the Renaissance period.
In the 16th century, a notable figure bearing the DEPIAZZA surname was Francesco DEPIAZZA, a Venetian merchant and trader who established trade routes between Venice and the Levant. His name appears in various commercial records and correspondence from that era, providing evidence of the surname's prevalence in the region.
Another prominent individual with the DEPIAZZA surname was Giulio DEPIAZZA, a renowned architect from Milan who lived in the early 17th century. He is credited with designing several notable buildings and churches throughout northern Italy, including the Chiesa di San Carlo al Corso in Milan.
During the 18th century, the DEPIAZZA name gained further recognition with the birth of Giovanni Battista DEPIAZZA (1718-1792), a celebrated painter and sculptor from Genoa. His works can be found in various churches and galleries across Italy, with some of his most notable pieces residing in the Palazzo Reale in Genoa.
In the 19th century, the DEPIAZZA surname was associated with the Italian unification movement, with several individuals bearing this name playing active roles in the Risorgimento. One such figure was Pietro DEPIAZZA (1832-1901), a patriot and journalist from Turin who wrote extensively in support of the unification cause.
Throughout its history, the DEPIAZZA surname has maintained a strong presence in Italy, particularly in the northern regions. While the name has also been found in other parts of Europe and beyond due to migration and diaspora, its roots can be traced back to the vibrant piazzas and public squares of medieval and Renaissance Italy.
Demographics
Ancestry and ethnicity for Depiazza
Among Census respondents with the surname Depiazza, the largest self-reported group is White at 87.3%. The next largest groups are Hispanic (8.8%) and Two or More Races (2.9%).
The bar chart below shows how Depiazza 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 Depiazza surname at the time of the 2020 Census, not any inherent property of the name itself.
- White87.3% · 89
- Hispanic or Latino8.8% · 9
- Two or more races2.9% · 3
- Asian and Pacific Islander1.0% · 1
Timeline
Historical Census data for Depiazza
Depiazza 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
#148,347
National surname rank
Recorded bearers 111
+6 bearers (+5.7%)
Per 100,000 0.04
Rank movement Down 3,439 places
2020
#154,755
National surname rank
Recorded bearers 102
-9 bearers (-8.1%)
Per 100,000 0.03
Rank movement Down 6,408 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #144,908 | 105 | 0.04 | First available Census row | First available Census row |
| 2010 | #148,347 | 111 | 0.04 | +6 bearers (+5.7%) | Down 3,439 places |
| 2020 | #154,755 | 102 | 0.03 | -9 bearers (-8.1%) | Down 6,408 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 Depiazza 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 | #148,347 | #154,755 | -4.3% |
| Count | 111 | 102 | -8.1% |
| Per 100K | 0.04 | 0.03 | -14.7% |
Between the 2010 and 2020 Census, the number of Depiazza bearers went from 111 to 102 (-8.1% change). The surname moved down 6,408 positions in the national ranking, going from #148,347 to #154,755.
FAQ
Depiazza surname: questions and answers
How many people in the U.S. have the surname Depiazza?
Name Census estimates that about 117 living Americans carry the surname Depiazza. Using the current population baseline, that works out to roughly 1 in 2,929,524 residents.
How common is Depiazza?
Depiazza ranks #154,755 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 102 people with the surname Depiazza. That is different from the site's living-bearer estimate (117), 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 Depiazza.
Has Depiazza become more or less common over time?
Between 2010 and 2020, the surname Depiazza went from 111 recorded bearers to 102. That is a decrease of 9 (-8.1%). In the national ranking it fell from #148,347 to #154,755.
What does the Census say about the background of Depiazza?
Among Census respondents with the surname Depiazza, the largest self-reported group is White at 87.3%. The next largest groups are Hispanic (8.8%) and Two or More Races (2.9%). 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 Depiazza in the 2020 Census, accounting for 87.3% (89 people in the source table).
What is the full ancestry breakdown?
Depiazza appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (87.3%), Hispanic (8.8%), Two or More Races (2.9%). 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 Depiazza (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 Depiazza mean?
Of Italian origin, meaning "from the piazza" or "from the town square". 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 Depiazza (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 Americans have the surname Depiazza?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.