2000
#64,008
National surname rank
Recorded bearers 291
First available Census row
Per 100,000 0.11
Very Rare Last name
Sangiacomo
An Italian surname derived from Saint James (San Giacomo), possibly indicating one's hometown.
According to the 2020 US Census Bureau surname tables, roughly 330 Americans carry the last name Sangiacomo. That puts it at #72,692 in the national surname ranking, appearing at a frequency of 0.10 per 100,000 people (about 1 in 1,038,650 residents).
This page is the full Name Census profile for the Sangiacomo 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
330
1 in 1,038,650
Census rank
#72,692
2020 decennial data
Per 100,000
0.1
Frequency rate
Recorded bearers
288
very rare in the US
Popularity narrative
The Census Bureau recorded 288 bearers of the surname Sangiacomo in its 2020 decennial surname file. At a rate of 0.10 per 100,000 residents, it holds the 72692nd position in the national surname ranking.
Among Census respondents with the surname Sangiacomo, the largest self-reported group is White at 90.3%. The next largest groups are Hispanic (8.0%) and American Indian/Alaska Native (1.0%).
Origin
Meaning and origin of Sangiacomo
The surname Sangiacomo is of Italian origin, specifically from the regions of Liguria and Tuscany. It is derived from the Italian phrase "San Giacomo," which means "Saint James." This name likely has its roots in the Middle Ages, when the veneration of Saint James was widespread, particularly during the medieval era's religious pilgrimages.
One of the earliest recorded instances of the surname Sangiacomo can be found in the Codice Diplomatico della Repubblica di Genova, a collection of diplomatic documents from the Republic of Genoa, dating back to the 13th century. This suggests that the name was already in use during that time period in the region of Liguria.
In the 14th century, there are records of a nobleman named Oberto Sangiacomo, who was a prominent figure in the city of Genoa. He was involved in various political and military affairs during the conflicts between the Guelphs and Ghibellines in medieval Italy.
During the Renaissance period, the name Sangiacomo was associated with several notable individuals, including the architect and sculptor Jacopo Sangiacomo, who was active in the 16th century and contributed to the construction of various churches and palaces in Genoa.
In the 17th century, a famous painter named Giovanni Battista Sangiacomo gained recognition for his religious paintings and frescoes, which adorned many churches in Liguria and Tuscany.
Another notable figure with the surname Sangiacomo was Domenico Sangiacomo, a philosopher and theologian who lived in the 18th century. He was a professor at the University of Genoa and authored several works on ethics and moral philosophy.
In the 19th century, the name Sangiacomo was also associated with a prominent family from the town of Chiavari in Liguria, where they were involved in various business ventures and held influential positions in local government.
Overall, the surname Sangiacomo has a rich historical legacy, particularly in the regions of Liguria and Tuscany, where it has been present for centuries and has been carried by individuals who have made significant contributions to various fields, including architecture, art, philosophy, and local governance.
Demographics
Ancestry and ethnicity for Sangiacomo
Among Census respondents with the surname Sangiacomo, the largest self-reported group is White at 90.3%. The next largest groups are Hispanic (8.0%) and American Indian/Alaska Native (1.0%).
The bar chart below shows how Sangiacomo 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 Sangiacomo surname at the time of the 2020 Census, not any inherent property of the name itself.
- White90.3% · 260
- Hispanic or Latino8.0% · 23
- American Indian and Alaska Native1.0% · 3
- Black or African American0.3% · 1
- Two or more races0.3% · 1
Timeline
Historical Census data for Sangiacomo
Sangiacomo 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
#66,553
National surname rank
Recorded bearers 297
+6 bearers (+2.1%)
Per 100,000 0.10
Rank movement Down 2,545 places
2020
#72,692
National surname rank
Recorded bearers 288
-9 bearers (-3.0%)
Per 100,000 0.10
Rank movement Down 6,139 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #64,008 | 291 | 0.11 | First available Census row | First available Census row |
| 2010 | #66,553 | 297 | 0.10 | +6 bearers (+2.1%) | Down 2,545 places |
| 2020 | #72,692 | 288 | 0.10 | -9 bearers (-3.0%) | Down 6,139 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 Sangiacomo 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 | #66,553 | #72,692 | -9.2% |
| Count | 297 | 288 | -3.0% |
| Per 100K | 0.10 | 0.10 | -3.6% |
Between the 2010 and 2020 Census, the number of Sangiacomo bearers went from 297 to 288 (-3.0% change). The surname moved down 6,139 positions in the national ranking, going from #66,553 to #72,692.
Notable bearers
Famous people with the surname Sangiacomo
FAQ
Sangiacomo surname: questions and answers
How many people in the U.S. have the surname Sangiacomo?
Name Census estimates that about 330 living Americans carry the surname Sangiacomo. Using the current population baseline, that works out to roughly 1 in 1,038,650 residents.
How common is Sangiacomo?
Sangiacomo ranks #72,692 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.10 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 288 people with the surname Sangiacomo. That is different from the site's living-bearer estimate (330), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.1 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.10 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 Sangiacomo.
Has Sangiacomo become more or less common over time?
Between 2010 and 2020, the surname Sangiacomo went from 297 recorded bearers to 288. That is a decrease of 9 (-3.0%). In the national ranking it fell from #66,553 to #72,692.
What does the Census say about the background of Sangiacomo?
Among Census respondents with the surname Sangiacomo, the largest self-reported group is White at 90.3%. The next largest groups are Hispanic (8.0%) and American Indian/Alaska Native (1.0%). 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 Sangiacomo in the 2020 Census, accounting for 90.3% (260 people in the source table).
What is the full ancestry breakdown?
Sangiacomo appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (90.3%), Hispanic (8.0%), American Indian/Alaska Native (1.0%). 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 Sangiacomo (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 Sangiacomo mean?
An Italian surname derived from Saint James (San Giacomo), possibly indicating one's hometown. 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 Sangiacomo (0.10 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 Sangiacomo?
If you just want to know how many Americans have the surname Sangiacomo, HowManyOfMe.org gives you the headline number in one glance.