2000
#55,237
National surname rank
Recorded bearers 348
First available Census row
Per 100,000 0.13
Very Rare Last name
Derocco
A surname derived from the French phrase "de la roche", meaning "from the rock".
According to the 2020 US Census Bureau surname tables, roughly 380 Americans carry the last name Derocco. That puts it at #64,820 in the national surname ranking, appearing at a frequency of 0.11 per 100,000 people (about 1 in 901,985 residents).
This page is the full Name Census profile for the Derocco 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
380
1 in 901,985
Census rank
#64,820
2020 decennial data
Per 100,000
0.1
Frequency rate
Recorded bearers
331
very rare in the US
Popularity narrative
The Census Bureau recorded 331 bearers of the surname Derocco in its 2020 decennial surname file. At a rate of 0.11 per 100,000 residents, it holds the 64820th position in the national surname ranking.
Among Census respondents with the surname Derocco, the largest self-reported group is White at 94.0%. The next largest groups are Hispanic (3.3%) and Two or More Races (1.5%).
Origin
Meaning and origin of Derocco
The surname DEROCCO is of Italian origin, likely derived from the Latin words "de" meaning "from" and "rocco" meaning "rock" or "fortress." It is believed to have originated in the regions of Campania, Calabria, and Sicily during the Middle Ages.
The earliest recorded instances of the name DEROCCO can be traced back to the 12th century, where it appeared in various documents and records from southern Italy. Some of these early references include the Codex Diplomaticus Cavensis, a collection of medieval charters from the Campania region, and the Tabulario della Certosa di San Martino, a compilation of documents related to the Carthusian monastery in Naples.
One of the earliest known individuals with the surname DEROCCO was Guglielmo DEROCCO, a nobleman from the city of Salerno, who lived in the late 12th century. He was mentioned in several legal documents and land transactions during that time.
In the 14th century, the name DEROCCO appeared in various records from the Kingdom of Naples, including tax rolls and census documents. One notable individual was Tommaso DEROCCO, a merchant from the town of Amalfi, who was involved in maritime trade in the Mediterranean region.
During the Renaissance period, the DEROCCO family gained prominence in the arts and literature. Giulio DEROCCO (1524-1592), a poet and playwright from Naples, was renowned for his works in the Neapolitan dialect. His contemporaries included the renowned philosopher Giordano Bruno, who was born in the town of Nola, near Naples.
In the 17th century, the DEROCCO name was associated with the military and nobility. Vincenzo DEROCCO (1612-1678) was a distinguished commander in the Neapolitan army, who fought in several battles during the wars between Spain and France for control of the Italian peninsula.
Other notable individuals with the surname DEROCCO include Raffaele DEROCCO (1784-1859), a prominent architect from Calabria who designed several churches and public buildings in the region, and Gaetano DEROCCO (1822-1898), a political activist and journalist from Sicily who played a role in the Risorgimento movement for Italian unification.
While the DEROCCO surname has its roots in southern Italy, it has since spread to other parts of the country and beyond, with descendants of the original families settling in various regions and countries around the world.
Demographics
Ancestry and ethnicity for Derocco
Among Census respondents with the surname Derocco, the largest self-reported group is White at 94.0%. The next largest groups are Hispanic (3.3%) and Two or More Races (1.5%).
The bar chart below shows how Derocco 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 Derocco surname at the time of the 2020 Census, not any inherent property of the name itself.
- White94.0% · 311
- Hispanic or Latino3.3% · 11
- Two or more races1.5% · 5
- Black or African American0.6% · 2
- Asian and Pacific Islander0.6% · 2
Timeline
Historical Census data for Derocco
Derocco 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
#54,752
National surname rank
Recorded bearers 376
+28 bearers (+8.0%)
Per 100,000 0.13
Rank movement Up 485 places
2020
#64,820
National surname rank
Recorded bearers 331
-45 bearers (-12.0%)
Per 100,000 0.11
Rank movement Down 10,068 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #55,237 | 348 | 0.13 | First available Census row | First available Census row |
| 2010 | #54,752 | 376 | 0.13 | +28 bearers (+8.0%) | Up 485 places |
| 2020 | #64,820 | 331 | 0.11 | -45 bearers (-12.0%) | Down 10,068 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 Derocco 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 | #54,752 | #64,820 | -18.4% |
| Count | 376 | 331 | -12.0% |
| Per 100K | 0.13 | 0.11 | -14.8% |
Between the 2010 and 2020 Census, the number of Derocco bearers went from 376 to 331 (-12.0% change). The surname moved down 10,068 positions in the national ranking, going from #54,752 to #64,820.
FAQ
Derocco surname: questions and answers
How many people in the U.S. have the surname Derocco?
Name Census estimates that about 380 living Americans carry the surname Derocco. Using the current population baseline, that works out to roughly 1 in 901,985 residents.
How common is Derocco?
Derocco ranks #64,820 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.11 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 331 people with the surname Derocco. That is different from the site's living-bearer estimate (380), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.11 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.11 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 Derocco.
Has Derocco become more or less common over time?
Between 2010 and 2020, the surname Derocco went from 376 recorded bearers to 331. That is a decrease of 45 (-12.0%). In the national ranking it fell from #54,752 to #64,820.
What does the Census say about the background of Derocco?
Among Census respondents with the surname Derocco, the largest self-reported group is White at 94.0%. The next largest groups are Hispanic (3.3%) 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 Derocco in the 2020 Census, accounting for 94.0% (311 people in the source table).
What is the full ancestry breakdown?
Derocco appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (94.0%), Hispanic (3.3%), 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 Derocco (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 Derocco mean?
A surname derived from the French phrase "de la roche", meaning "from the rock". 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 Derocco (0.11 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 Derocco?
Our sister site HowManyOfMe.org answers how many people are called Derocco at a glance, with the living-bearer count up front.