2000
#78,035
National surname rank
Recorded bearers 228
First available Census row
Per 100,000 0.08
Very Rare Last name
Baiocchi
An Italian surname derived from "baiocco", a former type of small Italian coin.
According to the 2020 US Census Bureau surname tables, roughly 323 Americans carry the last name Baiocchi. That puts it at #73,993 in the national surname ranking, appearing at a frequency of 0.09 per 100,000 people (about 1 in 1,061,159 residents).
This page is the full Name Census profile for the Baiocchi 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
323
1 in 1,061,159
Census rank
#73,993
2020 decennial data
Per 100,000
0.1
Frequency rate
Recorded bearers
282
very rare in the US
Popularity narrative
The Census Bureau recorded 282 bearers of the surname Baiocchi in its 2020 decennial surname file. At a rate of 0.09 per 100,000 residents, it holds the 73993rd position in the national surname ranking.
Among Census respondents with the surname Baiocchi, the largest self-reported group is White at 88.7%. The next largest groups are Two or More Races (5.0%) and Hispanic (3.2%).
Origin
Meaning and origin of Baiocchi
The surname Baiocchi has its origins in Italy, specifically in the central region of Lazio. It emerged during the Middle Ages, around the 10th to 13th centuries. The name is derived from the Italian word "baiocco," which was a type of low-value copper coin minted in Rome during that era.
One of the earliest known references to the surname Baiocchi can be found in a manuscript dated 1292, which mentions a certain "Giovanni Baiocchi" residing in the city of Rome. This document is currently housed in the archives of the Vatican Library.
In the 14th century, records show that the Baiocchi family had established themselves as prominent landowners in the town of Frascati, located near Rome. The family's coat of arms, featuring three copper coins, is a clear nod to the surname's monetary origins.
As the centuries passed, the Baiocchi name spread to other parts of Italy, with notable individuals emerging across various fields. One of the most famous Baiocchis was Giacomo Baiocchi (1637-1702), a renowned sculptor and architect from the city of Viterbo. His works can be found adorning numerous churches and palaces throughout Italy.
Another distinguished bearer of the surname was Francesco Baiocchi (1785-1860), a renowned physicist and mathematician from Rome. He made significant contributions to the field of optics and authored several influential scientific treatises.
In the realm of literature, the name Baiocchi is associated with the Italian novelist and poet, Giuseppe Baiocchi (1820-1891). His works, which often explored themes of social injustice and the plight of the working class, earned him widespread acclaim during his lifetime.
During the 19th century, the Baiocchi family also produced several notable figures in the fields of law and politics. Cesare Baiocchi (1845-1918) was a prominent lawyer and judge who served as a member of the Italian parliament for several terms.
Throughout its long history, the surname Baiocchi has been spelled in various ways, such as Bajocchi, Baiocco, and Baiocca, reflecting the regional variations in Italian dialects. However, the core meaning and origin of the name have remained consistent, tracing back to the humble copper coin that gave rise to this illustrious Italian surname.
Demographics
Ancestry and ethnicity for Baiocchi
Among Census respondents with the surname Baiocchi, the largest self-reported group is White at 88.7%. The next largest groups are Two or More Races (5.0%) and Hispanic (3.2%).
The bar chart below shows how Baiocchi 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 Baiocchi surname at the time of the 2020 Census, not any inherent property of the name itself.
- White88.7% · 250
- Two or more races5.0% · 14
- Hispanic or Latino3.2% · 9
- Black or African American1.4% · 4
- Asian and Pacific Islander1.4% · 4
- American Indian and Alaska Native0.4% · 1
Timeline
Historical Census data for Baiocchi
Baiocchi 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
#71,042
National surname rank
Recorded bearers 275
+47 bearers (+20.6%)
Per 100,000 0.09
Rank movement Up 6,993 places
2020
#73,993
National surname rank
Recorded bearers 282
+7 bearers (+2.5%)
Per 100,000 0.09
Rank movement Down 2,951 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #78,035 | 228 | 0.08 | First available Census row | First available Census row |
| 2010 | #71,042 | 275 | 0.09 | +47 bearers (+20.6%) | Up 6,993 places |
| 2020 | #73,993 | 282 | 0.09 | +7 bearers (+2.5%) | Down 2,951 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 Baiocchi 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 | #71,042 | #73,993 | -4.2% |
| Count | 275 | 282 | 2.5% |
| Per 100K | 0.09 | 0.09 | 4.8% |
Between the 2010 and 2020 Census, the number of Baiocchi bearers went from 275 to 282 (+2.5% change). The surname moved down 2,951 positions in the national ranking, going from #71,042 to #73,993.
FAQ
Baiocchi surname: questions and answers
How many people in the U.S. have the surname Baiocchi?
Name Census estimates that about 323 living Americans carry the surname Baiocchi. Using the current population baseline, that works out to roughly 1 in 1,061,159 residents.
How common is Baiocchi?
Baiocchi ranks #73,993 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.09 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 282 people with the surname Baiocchi. That is different from the site's living-bearer estimate (323), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.09 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.09 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 Baiocchi.
Has Baiocchi become more or less common over time?
Between 2010 and 2020, the surname Baiocchi went from 275 recorded bearers to 282. That is an increase of 7 (+2.5%). In the national ranking it fell from #71,042 to #73,993.
What does the Census say about the background of Baiocchi?
Among Census respondents with the surname Baiocchi, the largest self-reported group is White at 88.7%. The next largest groups are Two or More Races (5.0%) and Hispanic (3.2%). 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 Baiocchi in the 2020 Census, accounting for 88.7% (250 people in the source table).
What is the full ancestry breakdown?
Baiocchi appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (88.7%), Two or More Races (5.0%), Hispanic (3.2%). 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 Baiocchi (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 Baiocchi mean?
An Italian surname derived from "baiocco", a former type of small Italian coin. 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 Baiocchi (0.09 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 Baiocchi?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.