2000
#138,741
National surname rank
Recorded bearers 111
First available Census row
Per 100,000 0.04
Very Rare Last name
Dallapiazza
An Italian surname indicating a person was from a particular town or village known as La Piazza.
According to the 2020 US Census Bureau surname tables, roughly 116 Americans carry the last name Dallapiazza. 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 Dallapiazza 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 Dallapiazza 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 Dallapiazza, the largest self-reported group is White at 94.1%. The next largest groups are Hispanic (3.0%) and Two or More Races (2.0%).
Origin
Meaning and origin of Dallapiazza
The surname DALLAPIAZZA is of Italian origin, tracing its roots back to the medieval period. It is a locational surname, derived from the Italian words "dalla" meaning "from" and "piazza" referring to a town square or marketplace.
This surname is believed to have originated in the regions of northern Italy, particularly in the areas around Venice and the surrounding Veneto region. It likely referred to individuals who lived near or worked in the central piazzas or marketplaces of these towns.
While there are no definitive records of its earliest usage, surnames derived from places became common in Italy during the late Middle Ages as a means of distinguishing individuals within growing urban populations.
One of the earliest recorded instances of the name DALLAPIAZZA can be found in a document from the Venetian archives, dated 1437, which mentions a merchant named Giovanni DALLAPIAZZA conducting business in the city's famous Piazza San Marco.
Another notable early bearer of this surname was Niccolò DALLAPIAZZA, a renowned painter from Verona who lived during the late 15th century and is credited with several frescoes adorning churches in his native city.
In the 16th century, the DALLAPIAZZA family gained prominence in the city of Padua, where they were involved in the wool trade. Records from this period include references to a Marco DALLAPIAZZA, who served as a city councilor in 1568.
During the Renaissance, the name DALLAPIAZZA was also associated with the arts. Pietro DALLAPIAZZA, born in Venice in 1492, was a celebrated sculptor whose works can still be found in various churches and palaces throughout the Veneto region.
As the surname spread beyond its origins in northern Italy, it became associated with notable individuals in other parts of the country. One such figure was Girolamo DALLAPIAZZA, a 17th-century jurist and legal scholar from Naples who wrote extensively on maritime law.
Demographics
Ancestry and ethnicity for Dallapiazza
Among Census respondents with the surname Dallapiazza, the largest self-reported group is White at 94.1%. The next largest groups are Hispanic (3.0%) and Two or More Races (2.0%).
The bar chart below shows how Dallapiazza 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 Dallapiazza surname at the time of the 2020 Census, not any inherent property of the name itself.
- White94.1% · 95
- Hispanic or Latino3.0% · 3
- Two or more races2.0% · 2
- Black or African American1.0% · 1
Timeline
Historical Census data for Dallapiazza
Dallapiazza 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
#138,304
National surname rank
Recorded bearers 121
+10 bearers (+9.0%)
Per 100,000 0.04
Rank movement Up 437 places
2020
#155,270
National surname rank
Recorded bearers 101
-20 bearers (-16.5%)
Per 100,000 0.03
Rank movement Down 16,966 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #138,741 | 111 | 0.04 | First available Census row | First available Census row |
| 2010 | #138,304 | 121 | 0.04 | +10 bearers (+9.0%) | Up 437 places |
| 2020 | #155,270 | 101 | 0.03 | -20 bearers (-16.5%) | Down 16,966 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 Dallapiazza 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 | #138,304 | #155,270 | -12.3% |
| Count | 121 | 101 | -16.5% |
| Per 100K | 0.04 | 0.03 | -15.5% |
Between the 2010 and 2020 Census, the number of Dallapiazza bearers went from 121 to 101 (-16.5% change). The surname moved down 16,966 positions in the national ranking, going from #138,304 to #155,270.
FAQ
Dallapiazza surname: questions and answers
How many people in the U.S. have the surname Dallapiazza?
Name Census estimates that about 116 living Americans carry the surname Dallapiazza. Using the current population baseline, that works out to roughly 1 in 2,954,779 residents.
How common is Dallapiazza?
Dallapiazza 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 Dallapiazza. 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 Dallapiazza.
Has Dallapiazza become more or less common over time?
Between 2010 and 2020, the surname Dallapiazza went from 121 recorded bearers to 101. That is a decrease of 20 (-16.5%). In the national ranking it fell from #138,304 to #155,270.
What does the Census say about the background of Dallapiazza?
Among Census respondents with the surname Dallapiazza, the largest self-reported group is White at 94.1%. The next largest groups are Hispanic (3.0%) and Two or More Races (2.0%). 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 Dallapiazza in the 2020 Census, accounting for 94.1% (95 people in the source table).
What is the full ancestry breakdown?
Dallapiazza appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (94.1%), Hispanic (3.0%), Two or More Races (2.0%). 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 Dallapiazza (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 Dallapiazza mean?
An Italian surname indicating a person was from a particular town or village known as La Piazza. 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 Dallapiazza (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 are called Dallapiazza?
See how many Americans have the surname Dallapiazza on HowManyOfMe.org, our sister site built around that single question.