2000
#131,366
National surname rank
Recorded bearers 119
First available Census row
Per 100,000 0.04
Very Rare Last name
Dalmaso
Family from the Venetian town of Dalmasso.
According to the 2020 US Census Bureau surname tables, roughly 126 Americans carry the last name Dalmaso. That puts it at #149,446 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,720,273 residents).
This page is the full Name Census profile for the Dalmaso 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
126
1 in 2,720,273
Census rank
#149,446
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
110
very rare in the US
Popularity narrative
The Census Bureau recorded 110 bearers of the surname Dalmaso in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 149446th position in the national surname ranking.
Among Census respondents with the surname Dalmaso, the largest self-reported group is White at 99.1%. The next largest groups are American Indian/Alaska Native (0.9%).
Origin
Meaning and origin of Dalmaso
The surname Dalmaso has its origins in Italy, specifically in the region of Veneto. It likely emerged during the Middle Ages, between the 11th and 15th centuries. The name Dalmaso is believed to be derived from the Latin name "Dalmasius," which itself comes from the Greek word "Dalmatios," meaning "from Dalmatia," an ancient region located in modern-day Croatia and parts of neighboring countries.
One of the earliest recorded instances of the name Dalmaso can be found in the "Codice Diplomatico Padovano," a collection of historical documents from the city of Padua, dating back to the 12th century. In these records, a certain "Dalmaso de Vigodarzere" is mentioned as a landowner in the year 1192.
Another notable figure bearing this name was Dalmaso Raimondi, a prominent Venetian merchant and diplomat who lived in the 15th century. He played a crucial role in negotiating trade agreements between the Republic of Venice and various Mediterranean powers.
In the 16th century, a priest named Dalmaso Pallavicino served as the Bishop of Reggio Emilia from 1554 to 1587. He was known for his efforts in promoting religious education and supporting the Counter-Reformation movement.
Moving forward, in the 18th century, Dalmaso Valeriano was a renowned Italian architect and sculptor. He was responsible for designing several important buildings in Venice, including the Palazzo Bembo and the Church of San Vio.
Lastly, in the 19th century, Dalmaso Trevisan was an Italian politician and lawyer who served as a member of the Parliament of the Kingdom of Sardinia, representing the city of Verona.
The name Dalmaso has also been associated with various place names in Italy, such as Dalmasoio, a small village in the province of Bergamo, and Dalmasso, a town in the province of Cuneo. These place names likely derived from the surname itself, indicating the presence of families bearing this name in those respective areas.
Demographics
Ancestry and ethnicity for Dalmaso
Among Census respondents with the surname Dalmaso, the largest self-reported group is White at 99.1%. The next largest groups are American Indian/Alaska Native (0.9%).
The bar chart below shows how Dalmaso 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 Dalmaso surname at the time of the 2020 Census, not any inherent property of the name itself.
- White99.1% · 109
- American Indian and Alaska Native0.9% · 1
Timeline
Historical Census data for Dalmaso
Dalmaso 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
#139,228
National surname rank
Recorded bearers 120
+1 bearers (+0.8%)
Per 100,000 0.04
Rank movement Down 7,862 places
2020
#149,446
National surname rank
Recorded bearers 110
-10 bearers (-8.3%)
Per 100,000 0.04
Rank movement Down 10,218 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #131,366 | 119 | 0.04 | First available Census row | First available Census row |
| 2010 | #139,228 | 120 | 0.04 | +1 bearers (+0.8%) | Down 7,862 places |
| 2020 | #149,446 | 110 | 0.04 | -10 bearers (-8.3%) | Down 10,218 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 Dalmaso 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 | #139,228 | #149,446 | -7.3% |
| Count | 120 | 110 | -8.3% |
| Per 100K | 0.04 | 0.04 | -8.0% |
Between the 2010 and 2020 Census, the number of Dalmaso bearers went from 120 to 110 (-8.3% change). The surname moved down 10,218 positions in the national ranking, going from #139,228 to #149,446.
FAQ
Dalmaso surname: questions and answers
How many people in the U.S. have the surname Dalmaso?
Name Census estimates that about 126 living Americans carry the surname Dalmaso. Using the current population baseline, that works out to roughly 1 in 2,720,273 residents.
How common is Dalmaso?
Dalmaso ranks #149,446 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 110 people with the surname Dalmaso. That is different from the site's living-bearer estimate (126), 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 Dalmaso.
Has Dalmaso become more or less common over time?
Between 2010 and 2020, the surname Dalmaso went from 120 recorded bearers to 110. That is a decrease of 10 (-8.3%). In the national ranking it fell from #139,228 to #149,446.
What does the Census say about the background of Dalmaso?
Among Census respondents with the surname Dalmaso, the largest self-reported group is White at 99.1%. The next largest groups are American Indian/Alaska Native (0.9%). 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 Dalmaso in the 2020 Census, accounting for 99.1% (109 people in the source table).
What is the full ancestry breakdown?
Dalmaso appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (99.1%), American Indian/Alaska Native (0.9%). 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 Dalmaso (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 Dalmaso mean?
Family from the Venetian town of Dalmasso. 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 Dalmaso (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 common is the surname Dalmaso?
See how common the surname Dalmaso is on HowManyOfMe.org, our sister site built around that single question.