2000
#148,244
National surname rank
Recorded bearers 102
First available Census row
Per 100,000 0.04
Very Rare Last name
Diconza
A locational surname originating from a place name in Italy.
According to the 2020 US Census Bureau surname tables, roughly 117 Americans carry the last name Diconza. 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 Diconza 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 Diconza 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 Diconza, the largest self-reported group is White at 94.1%. The next largest groups are Hispanic (5.9%).
Origin
Meaning and origin of Diconza
The surname DICONZA has its origins in Italy, where it first appeared in the late 15th century. It is believed to have originated from the town of Conza, located in the province of Avellino in the Campania region. The prefix "di" is a common Italian preposition meaning "from," suggesting that the name DICONZA literally means "from Conza."
One of the earliest recorded instances of the name DICONZA can be found in a document dated 1487, which mentions a certain Nicola DICONZA, a landowner in the town of Conza. This suggests that the name was already well-established in the area by that time.
In the 16th century, the name DICONZA appears in several historical records, including a census of the town of Conza conducted in 1589. This census lists several families bearing the surname DICONZA, indicating that the name had become widespread in the region.
During the 17th and 18th centuries, several notable individuals with the surname DICONZA emerged. One such person was Antonio DICONZA (1643-1712), a renowned painter from Conza who specialized in religious art and whose works can still be found in churches across southern Italy.
Another notable figure was Gian Battista DICONZA (1701-1782), a scholar and philosopher who authored several treatises on logic and metaphysics. His works were widely read and discussed in academic circles throughout Europe during the Enlightenment period.
In the 19th century, the name DICONZA gained prominence outside of Italy as members of the family began to emigrate to other parts of the world. One such individual was Vincenzo DICONZA (1822-1901), who left Conza in 1848 and settled in Argentina, where he became a successful businessman and landowner.
Another noteworthy figure from this period was Maria DICONZA (1856-1924), a renowned opera singer who performed in some of the most prestigious venues across Europe, including La Scala in Milan and the Palais Garnier in Paris.
As the 20th century dawned, the DICONZA name continued to spread across the globe, with family members establishing roots in various countries, including the United States, Canada, and Australia.
Demographics
Ancestry and ethnicity for Diconza
Among Census respondents with the surname Diconza, the largest self-reported group is White at 94.1%. The next largest groups are Hispanic (5.9%).
The bar chart below shows how Diconza 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 Diconza surname at the time of the 2020 Census, not any inherent property of the name itself.
- White94.1% · 96
- Hispanic or Latino5.9% · 6
Timeline
Historical Census data for Diconza
Diconza 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
#141,140
National surname rank
Recorded bearers 118
+16 bearers (+15.7%)
Per 100,000 0.04
Rank movement Up 7,104 places
2020
#154,755
National surname rank
Recorded bearers 102
-16 bearers (-13.6%)
Per 100,000 0.03
Rank movement Down 13,615 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #148,244 | 102 | 0.04 | First available Census row | First available Census row |
| 2010 | #141,140 | 118 | 0.04 | +16 bearers (+15.7%) | Up 7,104 places |
| 2020 | #154,755 | 102 | 0.03 | -16 bearers (-13.6%) | Down 13,615 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 Diconza 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 | #141,140 | #154,755 | -9.6% |
| Count | 118 | 102 | -13.6% |
| Per 100K | 0.04 | 0.03 | -14.7% |
Between the 2010 and 2020 Census, the number of Diconza bearers went from 118 to 102 (-13.6% change). The surname moved down 13,615 positions in the national ranking, going from #141,140 to #154,755.
FAQ
Diconza surname: questions and answers
How many people in the U.S. have the surname Diconza?
Name Census estimates that about 117 living Americans carry the surname Diconza. Using the current population baseline, that works out to roughly 1 in 2,929,524 residents.
How common is Diconza?
Diconza 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 Diconza. 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 Diconza.
Has Diconza become more or less common over time?
Between 2010 and 2020, the surname Diconza went from 118 recorded bearers to 102. That is a decrease of 16 (-13.6%). In the national ranking it fell from #141,140 to #154,755.
What does the Census say about the background of Diconza?
Among Census respondents with the surname Diconza, the largest self-reported group is White at 94.1%. The next largest groups are Hispanic (5.9%). 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 Diconza in the 2020 Census, accounting for 94.1% (96 people in the source table).
What is the full ancestry breakdown?
Diconza appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (94.1%), Hispanic (5.9%). 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 Diconza (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 Diconza mean?
A locational surname originating from a place name in Italy. 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 Diconza (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 share the surname Diconza?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.