2000
#139,757
National surname rank
Recorded bearers 110
First available Census row
Per 100,000 0.04
Very Rare Last name
Dezio
A habitational surname derived from a place name in Italy.
According to the 2020 US Census Bureau surname tables, roughly 125 Americans carry the last name Dezio. That puts it at #150,205 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,742,035 residents).
This page is the full Name Census profile for the Dezio 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
125
1 in 2,742,035
Census rank
#150,205
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
109
very rare in the US
Popularity narrative
The Census Bureau recorded 109 bearers of the surname Dezio in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 150205th position in the national surname ranking.
Among Census respondents with the surname Dezio, the largest self-reported group is White at 91.7%. The next largest groups are Hispanic (3.7%) and Two or More Races (3.7%).
Origin
Meaning and origin of Dezio
The surname DEZIO is of Italian origin, tracing its roots back to the regions of Tuscany and Lazio, particularly around the cities of Florence and Rome. It is believed to have emerged during the Middle Ages, around the 12th or 13th century.
One theory suggests that DEZIO is derived from the Latin word "decimus," which means "tenth." This could indicate that the name was initially given to a tenth-born child or someone who held a position related to the number ten, such as a tax collector or a member of a council.
Another plausible origin is that DEZIO is a variant spelling of the Italian word "dizio," which means "eloquent" or "well-spoken." This could imply that the name was bestowed upon someone who was known for their oratory skills or their ability to communicate effectively.
Early records mentioning the DEZIO surname can be found in various historical documents from the region, including parish records, tax rolls, and notarial archives. One notable example is the appearance of the name in the "Codice Diplomatico Dantesco," a collection of documents related to the life of the famous poet Dante Alighieri, where a certain "Messer Dezio" is mentioned.
In the 14th century, a prominent figure named Pietro DEZIO served as a magistrate and jurist in the city of Siena. He was instrumental in drafting the city's legal code and played a significant role in local politics during that era.
During the Renaissance period, the DEZIO family produced several notable individuals. Andrea DEZIO (c. 1450-1528) was a renowned sculptor and architect who worked on various projects in Florence and its surrounding areas, including the Basilica of Santa Maria Novella.
In the 17th century, Vincenzo DEZIO (1592-1657) was a celebrated painter and fresco artist from Rome. He was commissioned to decorate numerous churches and palaces, and his works can still be admired in various locations throughout Italy.
Another prominent figure with the DEZIO surname was Girolamo DEZIO (1703-1781), a Jesuit scholar and theologian who taught at the Collegio Romano (now known as the Gregorian University) and authored several influential works on religious philosophy.
As the DEZIO name spread throughout Italy and beyond, it also gave rise to variations in spelling, such as Dezi, Dezzo, and Dezzi. Additionally, the name has been associated with various place names, including the town of Dezio in the province of Brescia, which may have influenced its evolution.
Demographics
Ancestry and ethnicity for Dezio
Among Census respondents with the surname Dezio, the largest self-reported group is White at 91.7%. The next largest groups are Hispanic (3.7%) and Two or More Races (3.7%).
The bar chart below shows how Dezio 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 Dezio surname at the time of the 2020 Census, not any inherent property of the name itself.
- White91.7% · 100
- Hispanic or Latino3.7% · 4
- Two or more races3.7% · 4
- Black or African American0.9% · 1
Timeline
Historical Census data for Dezio
Dezio 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
#145,220
National surname rank
Recorded bearers 114
+4 bearers (+3.6%)
Per 100,000 0.04
Rank movement Down 5,463 places
2020
#150,205
National surname rank
Recorded bearers 109
-5 bearers (-4.4%)
Per 100,000 0.04
Rank movement Down 4,985 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #139,757 | 110 | 0.04 | First available Census row | First available Census row |
| 2010 | #145,220 | 114 | 0.04 | +4 bearers (+3.6%) | Down 5,463 places |
| 2020 | #150,205 | 109 | 0.04 | -5 bearers (-4.4%) | Down 4,985 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 Dezio 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 | #145,220 | #150,205 | -3.4% |
| Count | 114 | 109 | -4.4% |
| Per 100K | 0.04 | 0.04 | -8.8% |
Between the 2010 and 2020 Census, the number of Dezio bearers went from 114 to 109 (-4.4% change). The surname moved down 4,985 positions in the national ranking, going from #145,220 to #150,205.
FAQ
Dezio surname: questions and answers
How many people in the U.S. have the surname Dezio?
Name Census estimates that about 125 living Americans carry the surname Dezio. Using the current population baseline, that works out to roughly 1 in 2,742,035 residents.
How common is Dezio?
Dezio ranks #150,205 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.04 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 109 people with the surname Dezio. That is different from the site's living-bearer estimate (125), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.04 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.04 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 Dezio.
Has Dezio become more or less common over time?
Between 2010 and 2020, the surname Dezio went from 114 recorded bearers to 109. That is a decrease of 5 (-4.4%). In the national ranking it fell from #145,220 to #150,205.
What does the Census say about the background of Dezio?
Among Census respondents with the surname Dezio, the largest self-reported group is White at 91.7%. The next largest groups are Hispanic (3.7%) and Two or More Races (3.7%). 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 Dezio in the 2020 Census, accounting for 91.7% (100 people in the source table).
What is the full ancestry breakdown?
Dezio appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (91.7%), Hispanic (3.7%), Two or More Races (3.7%). 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 Dezio (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 Dezio mean?
A habitational surname derived 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 Dezio (0.04 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 Dezio?
You can see how many people have the surname Dezio on our sister site HowManyOfMe.org — same data roots, lighter UI.