2000
#11,154
National surname rank
Recorded bearers 2,609
First available Census row
Per 100,000 0.97
Rare Last name
Dalessio
An Italian occupational surname referring to a stonemason or someone who worked with stone.
According to the 2020 US Census Bureau surname tables, roughly 2,944 Americans carry the last name Dalessio. That puts it at #11,682 in the national surname ranking, appearing at a frequency of 0.86 per 100,000 people (about 1 in 116,425 residents).
This page is the full Name Census profile for the Dalessio 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.
For British records, Name Census UK has a British surname profile for Dalessio with 1881 census detail, origin facts and modern UK distribution where available.
Bearers in the US
2.9K
1 in 116,425
Census rank
#11,682
2020 decennial data
Per 100,000
0.9
Frequency rate
Recorded bearers
2.6K
rare in the US
Popularity narrative
The Census Bureau recorded 2,567 bearers of the surname Dalessio in its 2020 decennial surname file. At a rate of 0.86 per 100,000 residents, it holds the 11682nd position in the national surname ranking.
Among Census respondents with the surname Dalessio, the largest self-reported group is White at 91.5%. The next largest groups are Hispanic (6.1%) and Two or More Races (1.5%).
Origin
Meaning and origin of Dalessio
The surname DALESSIO has its origins in Italy, specifically in the regions of Abruzzo and Molise. It can be traced back to the late 15th century and is believed to be derived from the Italian word "alessio," which means "defender" or "protector."
One of the earliest recorded instances of the name DALESSIO dates back to the late 16th century, when a family by that name resided in the town of Agnone, located in the province of Isernia, Molise. This suggests that the name may have originated in this region before spreading to other parts of Italy.
In the 17th century, the DALESSIO name appeared in several historical documents, including church records and land registries, particularly in the regions of Abruzzo and Molise. This indicates that the family had established a presence and likely held some social and economic standing in these areas during that time period.
One notable figure bearing the DALESSIO surname was Pietro DALESSIO, a renowned sculptor and architect from the town of Agnone, who lived in the late 16th and early 17th centuries. His work can be seen in several churches and public buildings throughout the region.
Another individual of historical significance was Girolamo DALESSIO, born in 1695 in Agnone. He was a prolific writer and philosopher who authored several books on various subjects, including theology and ethics. His works were widely read and influential during the Enlightenment period in Italy.
In the 19th century, the DALESSIO name can be found in records from the town of Campobasso, the capital of the Molise region. One notable figure from this era was Antonio DALESSIO, born in 1822, who was a prominent lawyer and politician. He served as a member of the Italian Parliament and played a significant role in the unification of Italy.
Another individual of note is Vincenzo DALESSIO, born in 1865 in the town of Capracotta, located in the province of Isernia, Molise. He was a renowned painter and sculptor, known for his works depicting scenes from rural life and landscapes of the Molise region.
Throughout the centuries, the DALESSIO surname has maintained a strong presence in the regions of Abruzzo and Molise, with various branches of the family establishing themselves in different towns and villages across these areas.
Demographics
Ancestry and ethnicity for Dalessio
Among Census respondents with the surname Dalessio, the largest self-reported group is White at 91.5%. The next largest groups are Hispanic (6.1%) and Two or More Races (1.5%).
The bar chart below shows how Dalessio 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 Dalessio surname at the time of the 2020 Census, not any inherent property of the name itself.
- White91.5% · 2,349
- Hispanic or Latino6.1% · 156
- Two or more races1.5% · 39
- Black or African American0.5% · 13
- Asian and Pacific Islander0.3% · 8
- American Indian and Alaska Native0.1% · 2
Timeline
Historical Census data for Dalessio
Dalessio 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
#11,603
National surname rank
Recorded bearers 2,706
+97 bearers (+3.7%)
Per 100,000 0.92
Rank movement Down 449 places
2020
#11,682
National surname rank
Recorded bearers 2,567
-139 bearers (-5.1%)
Per 100,000 0.86
Rank movement Down 79 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #11,154 | 2,609 | 0.97 | First available Census row | First available Census row |
| 2010 | #11,603 | 2,706 | 0.92 | +97 bearers (+3.7%) | Down 449 places |
| 2020 | #11,682 | 2,567 | 0.86 | -139 bearers (-5.1%) | Down 79 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 Dalessio 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 | #11,603 | #11,682 | -0.7% |
| Count | 2,706 | 2,567 | -5.1% |
| Per 100K | 0.92 | 0.86 | -6.6% |
Between the 2010 and 2020 Census, the number of Dalessio bearers went from 2,706 to 2,567 (-5.1% change). The surname moved down 79 positions in the national ranking, going from #11,603 to #11,682.
FAQ
Dalessio surname: questions and answers
How many people in the U.S. have the surname Dalessio?
Name Census estimates that about 2,944 living Americans carry the surname Dalessio. Using the current population baseline, that works out to roughly 1 in 116,425 residents.
How common is Dalessio?
Dalessio ranks #11,682 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 0.86 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 2,567 people with the surname Dalessio. That is different from the site's living-bearer estimate (2,944), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.86 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.86 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 Dalessio.
Has Dalessio become more or less common over time?
Between 2010 and 2020, the surname Dalessio went from 2,706 recorded bearers to 2,567. That is a decrease of 139 (-5.1%). In the national ranking it fell from #11,603 to #11,682.
What does the Census say about the background of Dalessio?
Among Census respondents with the surname Dalessio, the largest self-reported group is White at 91.5%. The next largest groups are Hispanic (6.1%) and Two or More Races (1.5%). 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 Dalessio in the 2020 Census, accounting for 91.5% (2,349 people in the source table).
What is the full ancestry breakdown?
Dalessio appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (91.5%), Hispanic (6.1%), Two or More Races (1.5%). 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 Dalessio (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 Dalessio mean?
An Italian occupational surname referring to a stonemason or someone who worked with stone. 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 Dalessio (0.86 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 Dalessio?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.