2000
#8,354
National surname rank
Recorded bearers 3,642
First available Census row
Per 100,000 1.35
Rare Last name
Delorenzo
An Italian surname referring to someone from the town of Lorenzana or derived from the given name Lorenzo.
According to the 2020 US Census Bureau surname tables, roughly 4,015 Americans carry the last name Delorenzo. That puts it at #8,972 in the national surname ranking, appearing at a frequency of 1.17 per 100,000 people (about 1 in 85,368 residents).
This page is the full Name Census profile for the Delorenzo 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
4.0K
1 in 85,368
Census rank
#8,972
2020 decennial data
Per 100,000
1.2
Frequency rate
Recorded bearers
3.5K
rare in the US
Popularity narrative
The Census Bureau recorded 3,501 bearers of the surname Delorenzo in its 2020 decennial surname file. At a rate of 1.17 per 100,000 residents, it holds the 8972nd position in the national surname ranking.
Among Census respondents with the surname Delorenzo, the largest self-reported group is White at 92.0%. The next largest groups are Hispanic (4.6%) and Two or More Races (2.2%).
Origin
Meaning and origin of Delorenzo
The surname DeLorenzo has its origins in Italy, dating back to the late medieval period around the 13th or 14th century. It is derived from the Italian personal name Lorenzo, which itself comes from the Latin name Laurentius, meaning "from Laurentum" (an ancient city near Rome). The prefix "de" in DeLorenzo means "from" or "of" in Italian, indicating that the name originally referred to someone from a place called Lorenzo or a location associated with that name.
One of the earliest recorded instances of the DeLorenzo surname can be found in historical documents from the town of Amalfi, a coastal city in the region of Campania, southern Italy. In the 14th century, a merchant named Giacomo DeLorenzo was mentioned in trade records from the city, suggesting that the surname was already established in that area.
The DeLorenzo name also has connections to the island of Sicily, where it was particularly prevalent in the province of Palermo. In the 16th century, a Sicilian noble named Giovanni DeLorenzo was recorded as owning large tracts of land near the town of Monreale, which was then a prominent agricultural center.
Over the centuries, several notable individuals have borne the DeLorenzo surname. One of the earliest was Pietro DeLorenzo, a Florentine painter and architect who lived from around 1430 to 1504. His works can still be seen in various churches and buildings throughout Florence and Tuscany.
In the 18th century, Vincenzo DeLorenzo (1730-1809) was a renowned composer and violinist from Naples, known for his contributions to the development of the classical concerto form. His compositions were highly regarded during his lifetime and continue to be studied and performed today.
Another prominent figure was Nicola DeLorenzo (1808-1885), an Italian politician and lawyer who served as a member of the Parliament of the Kingdom of Italy after the country's unification in 1861. He was a strong advocate for the rights of workers and played a significant role in shaping early labor laws in Italy.
More recently, Antonia DeLorenzo (1919-2010) was a celebrated Italian-American author and educator. Born in Sicily, she immigrated to the United States in the 1920s and went on to write several novels and memoirs depicting the experiences of Italian immigrants in America. Her works, such as "Fatevi Onore" (1999), are considered important contributions to Italian-American literature.
Throughout its history, the DeLorenzo surname has been spelled in various ways, including Delorenzo, De Lorenzo, and De Lorenzi, reflecting the regional variations and linguistic influences within Italy. However, the core meaning and origin of the name have remained consistent, tracing back to the Latin name Laurentius and the Italian town or region of Lorenzo.
Demographics
Ancestry and ethnicity for Delorenzo
Among Census respondents with the surname Delorenzo, the largest self-reported group is White at 92.0%. The next largest groups are Hispanic (4.6%) and Two or More Races (2.2%).
The bar chart below shows how Delorenzo 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 Delorenzo surname at the time of the 2020 Census, not any inherent property of the name itself.
- White92.0% · 3,222
- Hispanic or Latino4.6% · 162
- Two or more races2.2% · 77
- Asian and Pacific Islander0.6% · 22
- Black or African American0.5% · 17
- American Indian and Alaska Native0.0% · 1
Timeline
Historical Census data for Delorenzo
Delorenzo 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
#8,956
National surname rank
Recorded bearers 3,655
+13 bearers (+0.4%)
Per 100,000 1.24
Rank movement Down 602 places
2020
#8,972
National surname rank
Recorded bearers 3,501
-154 bearers (-4.2%)
Per 100,000 1.17
Rank movement Down 16 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #8,354 | 3,642 | 1.35 | First available Census row | First available Census row |
| 2010 | #8,956 | 3,655 | 1.24 | +13 bearers (+0.4%) | Down 602 places |
| 2020 | #8,972 | 3,501 | 1.17 | -154 bearers (-4.2%) | Down 16 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 Delorenzo 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 | #8,956 | #8,972 | -0.2% |
| Count | 3,655 | 3,501 | -4.2% |
| Per 100K | 1.24 | 1.17 | -5.5% |
Between the 2010 and 2020 Census, the number of Delorenzo bearers went from 3,655 to 3,501 (-4.2% change). The surname moved down 16 positions in the national ranking, going from #8,956 to #8,972.
FAQ
Delorenzo surname: questions and answers
How many people in the U.S. have the surname Delorenzo?
Name Census estimates that about 4,015 living Americans carry the surname Delorenzo. Using the current population baseline, that works out to roughly 1 in 85,368 residents.
How common is Delorenzo?
Delorenzo ranks #8,972 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 1.17 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 3,501 people with the surname Delorenzo. That is different from the site's living-bearer estimate (4,015), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 1.17 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 1.17 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 Delorenzo.
Has Delorenzo become more or less common over time?
Between 2010 and 2020, the surname Delorenzo went from 3,655 recorded bearers to 3,501. That is a decrease of 154 (-4.2%). In the national ranking it fell from #8,956 to #8,972.
What does the Census say about the background of Delorenzo?
Among Census respondents with the surname Delorenzo, the largest self-reported group is White at 92.0%. The next largest groups are Hispanic (4.6%) and Two or More Races (2.2%). 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 Delorenzo in the 2020 Census, accounting for 92.0% (3,222 people in the source table).
What is the full ancestry breakdown?
Delorenzo appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (92.0%), Hispanic (4.6%), Two or More Races (2.2%). 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 Delorenzo (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 Delorenzo mean?
An Italian surname referring to someone from the town of Lorenzana or derived from the given name Lorenzo. 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 Delorenzo (1.17 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 share the surname Delorenzo?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.