2010
#144,141
National surname rank
Recorded bearers 115
First available Census row
Per 100,000 0.04
Very Rare Last name
Dallacosta
A surname originating in Italy denoting someone who lived near the coast.
According to the 2020 US Census Bureau surname tables, roughly 134 Americans carry the last name Dallacosta. That puts it at #144,270 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,557,868 residents).
This page is the full Name Census profile for the Dallacosta 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
134
1 in 2,557,868
Census rank
#144,270
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
117
very rare in the US
Popularity narrative
The Census Bureau recorded 117 bearers of the surname Dallacosta in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 144270th position in the national surname ranking.
Among Census respondents with the surname Dallacosta, the largest self-reported group is White at 87.2%. The next largest groups are Hispanic (9.4%) and Two or More Races (2.6%).
Origin
Meaning and origin of Dallacosta
The surname DALLACOSTA is of Italian origin, derived from the phrase "dalla costa," which translates to "from the coast" or "from the shore." This surname likely originated in coastal regions of Italy during the Middle Ages, indicating that the earliest bearers of this name resided near the sea or along the coastline.
The earliest recorded instances of the surname DALLACOSTA can be traced back to the 13th and 14th centuries in various Italian coastal cities and towns, such as Genoa, Venice, and Naples. Historical records from this period often mention individuals with variations of the name, including DALLACOSTA, DALACOSTA, and DELACOSTA.
One of the earliest known bearers of the DALLACOSTA surname was Francesco DALLACOSTA, a Venetian merchant who lived in the late 13th century and was involved in the lucrative trade routes between Italy and the Byzantine Empire.
During the Renaissance period, the DALLACOSTA name gained prominence in the Republic of Genoa, where several members of the family held influential positions in the city's government and maritime affairs. Notably, Stefano DALLACOSTA (1470-1542) served as a prominent admiral in the Genoese navy and played a crucial role in the naval battles against the Ottoman Turks in the Mediterranean Sea.
In the 16th century, a branch of the DALLACOSTA family established itself in Naples, where they became known for their involvement in the local fishing industry and maritime trade. One of the most notable figures from this branch was Antonio DALLACOSTA (1525-1598), a successful ship captain and merchant who amassed significant wealth through his voyages across the Mediterranean.
The DALLACOSTA surname also appeared in historical records from other coastal regions of Italy, such as Calabria and Sicily, where it was associated with families engaged in fishing, seafaring, and coastal trading activities.
Throughout the centuries, several individuals with the DALLACOSTA surname have achieved notable accomplishments in various fields. For example, Giovanni DALLACOSTA (1680-1744) was a renowned Venetian architect who designed several churches and palaces in the Baroque style, while Luciano DALLACOSTA (1892-1965) was an Italian composer and conductor who gained recognition for his operas and orchestral works.
Demographics
Ancestry and ethnicity for Dallacosta
Among Census respondents with the surname Dallacosta, the largest self-reported group is White at 87.2%. The next largest groups are Hispanic (9.4%) and Two or More Races (2.6%).
The bar chart below shows how Dallacosta 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 Dallacosta surname at the time of the 2020 Census, not any inherent property of the name itself.
- White87.2% · 102
- Hispanic or Latino9.4% · 11
- Two or more races2.6% · 3
- American Indian and Alaska Native0.9% · 1
Timeline
Historical Census data for Dallacosta
Dallacosta appears in 2 published Census surname files: 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2020
#144,270
National surname rank
Recorded bearers 117
+2 bearers (+1.7%)
Per 100,000 0.04
Rank movement Down 129 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #144,141 | 115 | 0.04 | First available Census row | First available Census row |
| 2020 | #144,270 | 117 | 0.04 | +2 bearers (+1.7%) | Down 129 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 Dallacosta 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 | #144,141 | #144,270 | -0.1% |
| Count | 115 | 117 | 1.7% |
| Per 100K | 0.04 | 0.04 | -2.1% |
Between the 2010 and 2020 Census, the number of Dallacosta bearers went from 115 to 117 (+1.7% change). The surname moved down 129 positions in the national ranking, going from #144,141 to #144,270.
FAQ
Dallacosta surname: questions and answers
How many people in the U.S. have the surname Dallacosta?
Name Census estimates that about 134 living Americans carry the surname Dallacosta. Using the current population baseline, that works out to roughly 1 in 2,557,868 residents.
How common is Dallacosta?
Dallacosta ranks #144,270 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.04 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 117 people with the surname Dallacosta. That is different from the site's living-bearer estimate (134), 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 Dallacosta.
Has Dallacosta become more or less common over time?
Between 2010 and 2020, the surname Dallacosta went from 115 recorded bearers to 117. That is an increase of 2 (+1.7%). In the national ranking it fell from #144,141 to #144,270.
What does the Census say about the background of Dallacosta?
Among Census respondents with the surname Dallacosta, the largest self-reported group is White at 87.2%. The next largest groups are Hispanic (9.4%) and Two or More Races (2.6%). 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 Dallacosta in the 2020 Census, accounting for 87.2% (102 people in the source table).
What is the full ancestry breakdown?
Dallacosta appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (87.2%), Hispanic (9.4%), Two or More Races (2.6%). 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 Dallacosta (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 Dallacosta mean?
A surname originating in Italy denoting someone who lived near the coast. 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 Dallacosta (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 have the surname Dallacosta?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.