2000
#121,780
National surname rank
Recorded bearers 131
First available Census row
Per 100,000 0.05
Very Rare Last name
Delmoro
An Italian surname likely originating from a place name with the root words "del moro".
According to the 2020 US Census Bureau surname tables, roughly 186 Americans carry the last name Delmoro. That puts it at #114,613 in the national surname ranking, appearing at a frequency of 0.05 per 100,000 people (about 1 in 1,842,765 residents).
This page is the full Name Census profile for the Delmoro 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
186
1 in 1,842,765
Census rank
#114,613
2020 decennial data
Per 100,000
0.1
Frequency rate
Recorded bearers
162
very rare in the US
Popularity narrative
The Census Bureau recorded 162 bearers of the surname Delmoro in its 2020 decennial surname file. At a rate of 0.05 per 100,000 residents, it holds the 114613th position in the national surname ranking.
Among Census respondents with the surname Delmoro, the largest self-reported group is White at 72.2%. The next largest groups are Asian/Pacific Islander (16.7%) and Hispanic (7.4%).
Origin
Meaning and origin of Delmoro
The surname DELMORO has its origins in Spain, with the earliest records dating back to the 16th century. It is believed to have originated from the Spanish phrase "del moro," which translates to "of the Moor" or "of the Arab." This suggests that the name may have been given to individuals or families with connections to the Moorish population that once lived in parts of the Iberian Peninsula.
During the Reconquista period in Spain, as Christian kingdoms gradually regained control over territories previously ruled by the Moors, it was common for individuals or families with Moorish ancestry or ties to be identified with surnames reflecting their heritage. The name DELMORO could have been used to distinguish those with Moorish roots or associations.
One of the earliest documented references to the name DELMORO can be found in the parish records of the city of Seville, where a certain Juan DELMORO was recorded as a resident in the year 1587. This suggests that the name was already in use by that time in the southern region of Andalusia, which had a significant Moorish influence and history.
In the 17th century, records show that a family bearing the surname DELMORO settled in the region of Catalonia, in northeastern Spain. A notable figure from this lineage was Jaume DELMORO, a merchant who lived in Barcelona during the late 1600s and was involved in the textile trade with other Mediterranean countries.
As the name spread across Spain, variations in spelling and pronunciation emerged, such as DELMORA, DELMORÓ, and DELMORÍ. These variations likely reflected regional linguistic differences and the influence of local dialects.
Another individual of note was María DELMORO, a writer and poet born in Madrid in the early 19th century. Her works, which explored themes of love and nature, were published in various literary journals of the time.
In the 20th century, the DELMORO surname gained recognition through the achievements of Manuel DELMORO, a renowned Spanish architect who designed several notable buildings in Barcelona and Valencia between the 1920s and 1960s.
While the name DELMORO is not among the most common surnames in Spain today, it has a rich history that can be traced back to the country's Moorish heritage and the cultural exchanges that occurred during the Reconquista period.
Demographics
Ancestry and ethnicity for Delmoro
Among Census respondents with the surname Delmoro, the largest self-reported group is White at 72.2%. The next largest groups are Asian/Pacific Islander (16.7%) and Hispanic (7.4%).
The bar chart below shows how Delmoro 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 Delmoro surname at the time of the 2020 Census, not any inherent property of the name itself.
- White72.2% · 117
- Asian and Pacific Islander16.7% · 27
- Hispanic or Latino7.4% · 12
- Two or more races3.1% · 5
- American Indian and Alaska Native0.6% · 1
Timeline
Historical Census data for Delmoro
Delmoro 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
#127,494
National surname rank
Recorded bearers 134
+3 bearers (+2.3%)
Per 100,000 0.05
Rank movement Down 5,714 places
2020
#114,613
National surname rank
Recorded bearers 162
+28 bearers (+20.9%)
Per 100,000 0.05
Rank movement Up 12,881 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #121,780 | 131 | 0.05 | First available Census row | First available Census row |
| 2010 | #127,494 | 134 | 0.05 | +3 bearers (+2.3%) | Down 5,714 places |
| 2020 | #114,613 | 162 | 0.05 | +28 bearers (+20.9%) | Up 12,881 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 Delmoro 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 | #127,494 | #114,613 | 10.1% |
| Count | 134 | 162 | 20.9% |
| Per 100K | 0.05 | 0.05 | 8.4% |
Between the 2010 and 2020 Census, the number of Delmoro bearers went from 134 to 162 (+20.9% change). The surname moved up 12,881 positions in the national ranking, going from #127,494 to #114,613.
FAQ
Delmoro surname: questions and answers
How many people in the U.S. have the surname Delmoro?
Name Census estimates that about 186 living Americans carry the surname Delmoro. Using the current population baseline, that works out to roughly 1 in 1,842,765 residents.
How common is Delmoro?
Delmoro ranks #114,613 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.05 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 162 people with the surname Delmoro. That is different from the site's living-bearer estimate (186), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.05 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.05 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 Delmoro.
Has Delmoro become more or less common over time?
Between 2010 and 2020, the surname Delmoro went from 134 recorded bearers to 162. That is an increase of 28 (+20.9%). In the national ranking it rose from #127,494 to #114,613.
What does the Census say about the background of Delmoro?
Among Census respondents with the surname Delmoro, the largest self-reported group is White at 72.2%. The next largest groups are Asian/Pacific Islander (16.7%) and Hispanic (7.4%). 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 Delmoro in the 2020 Census, accounting for 72.2% (117 people in the source table).
What is the full ancestry breakdown?
Delmoro appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (72.2%), Asian/Pacific Islander (16.7%), Hispanic (7.4%). 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 Delmoro (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 Delmoro mean?
An Italian surname likely originating from a place name with the root words "del moro". 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 Delmoro (0.05 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 Delmoro?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.