2000
#2,300
National surname rank
Recorded bearers 14,463
First available Census row
Per 100,000 5.36
Uncommon Last name
Demarco
An Italian occupational surname referring to a person who was a marker or clerk.
According to the 2020 US Census Bureau surname tables, roughly 15,843 Americans carry the last name Demarco. That puts it at #2,550 in the national surname ranking, appearing at a frequency of 4.62 per 100,000 people (about 1 in 21,634 residents).
This page is the full Name Census profile for the Demarco 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 Demarco with 1881 census detail, origin facts and modern UK distribution where available.
Bearers in the US
16K
1 in 21,634
Census rank
#2,550
2020 decennial data
Per 100,000
4.6
Frequency rate
Recorded bearers
14K
uncommon in the US
Popularity narrative
The Census Bureau recorded 13,816 bearers of the surname Demarco in its 2020 decennial surname file. At a rate of 4.62 per 100,000 residents, it holds the 2550th position in the national surname ranking.
Among Census respondents with the surname Demarco, the largest self-reported group is White at 91.9%. The next largest groups are Hispanic (4.5%) and Two or More Races (2.1%).
Origin
Meaning and origin of Demarco
The surname DeMarco has its origins in Italy, with records indicating its presence as early as the 12th century. The name is derived from the Latin name Marcus, which was a common Roman name. The prefix "de" is a preposition meaning "of" or "from" in Italian, suggesting that the name originated as a way to distinguish someone who came from a place associated with the name Marcus.
One of the earliest recorded instances of the name DeMarco can be found in a manuscript from the Republic of Venice, dated around 1230. The document mentions a merchant named Pietro DeMarco, who was involved in trade between Venice and the Byzantine Empire. This suggests that the name was already established in the Venetian region during the medieval period.
In the 14th century, the name appears in records from the city of Naples, where a family of nobles with the surname DeMarco held land and influence. One notable member of this family was Girolamo DeMarco (1360-1432), a prominent jurist and legal scholar who served as a judge in the court of King Alfonso V of Aragon.
As the Italian Renaissance gained momentum, the name DeMarco became associated with the arts and culture. One of the most famous figures with this surname was the painter Marco DeMarco (1490-1547), known for his vibrant frescoes and religious works in the churches of Rome and Florence.
During the Age of Exploration, the name DeMarco traveled beyond the borders of Italy. In the 16th century, a Spanish explorer named Juan DeMarco (1515-1581) accompanied Hernando de Soto on his expeditions through Florida and the southeastern United States. DeMarco's accounts of these journeys provided valuable insights into the indigenous cultures encountered by the Spanish conquistadors.
In the realm of literature, the name DeMarco is associated with the Italian writer and philosopher Giacomo DeMarco (1628-1701), whose works on ethics and political theory influenced the Enlightenment thinkers of the 18th century.
As the centuries passed, the surname DeMarco continued to spread throughout Europe and beyond. Notable figures include the French composer Étienne DeMarco (1762-1838), whose operas were popular in Paris during the early 19th century, and the Argentine military leader Juan DeMarco (1801-1879), who played a significant role in the wars of independence from Spain.
Demographics
Ancestry and ethnicity for Demarco
Among Census respondents with the surname Demarco, the largest self-reported group is White at 91.9%. The next largest groups are Hispanic (4.5%) and Two or More Races (2.1%).
The bar chart below shows how Demarco 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 Demarco surname at the time of the 2020 Census, not any inherent property of the name itself.
- White91.9% · 12,702
- Hispanic or Latino4.5% · 618
- Two or more races2.1% · 293
- Asian and Pacific Islander0.7% · 103
- Black or African American0.6% · 85
- American Indian and Alaska Native0.1% · 15
Timeline
Historical Census data for Demarco
Demarco 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
#2,452
National surname rank
Recorded bearers 14,731
+268 bearers (+1.9%)
Per 100,000 4.99
Rank movement Down 152 places
2020
#2,550
National surname rank
Recorded bearers 13,816
-915 bearers (-6.2%)
Per 100,000 4.62
Rank movement Down 98 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #2,300 | 14,463 | 5.36 | First available Census row | First available Census row |
| 2010 | #2,452 | 14,731 | 4.99 | +268 bearers (+1.9%) | Down 152 places |
| 2020 | #2,550 | 13,816 | 4.62 | -915 bearers (-6.2%) | Down 98 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 Demarco 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 | #2,452 | #2,550 | -4.0% |
| Count | 14,731 | 13,816 | -6.2% |
| Per 100K | 4.99 | 4.62 | -7.4% |
Between the 2010 and 2020 Census, the number of Demarco bearers went from 14,731 to 13,816 (-6.2% change). The surname moved down 98 positions in the national ranking, going from #2,452 to #2,550.
FAQ
Demarco surname: questions and answers
How many people in the U.S. have the surname Demarco?
Name Census estimates that about 15,843 living Americans carry the surname Demarco. Using the current population baseline, that works out to roughly 1 in 21,634 residents.
How common is Demarco?
Demarco ranks #2,550 in the 2020 Census surname tables and is classified on this site as "Uncommon." The Census recorded the name at a frequency of 4.62 per 100,000 residents, which is about 5 people out of every 100,000.
How many people with this surname were counted in the Census?
The raw 2020 Census file counted 13,816 people with the surname Demarco. That is different from the site's living-bearer estimate (15,843), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 4.62 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 4.62 per 100,000 means that if you picked a random group of 100,000 U.S. residents, you would expect about 5 of them to have the surname Demarco.
Has Demarco become more or less common over time?
Between 2010 and 2020, the surname Demarco went from 14,731 recorded bearers to 13,816. That is a decrease of 915 (-6.2%). In the national ranking it fell from #2,452 to #2,550.
What does the Census say about the background of Demarco?
Among Census respondents with the surname Demarco, the largest self-reported group is White at 91.9%. The next largest groups are Hispanic (4.5%) and Two or More Races (2.1%). 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 Demarco in the 2020 Census, accounting for 91.9% (12,702 people in the source table).
What is the full ancestry breakdown?
Demarco appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (91.9%), Hispanic (4.5%), Two or More Races (2.1%). 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 Demarco (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 Demarco mean?
An Italian occupational surname referring to a person who was a marker or clerk. 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 Demarco (4.62 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 Demarco?
See how many people have the last name Demarco on HowManyOfMe.org, our sister site built around that single question.