2010
#138,304
National surname rank
Recorded bearers 121
First available Census row
Per 100,000 0.04
Very Rare Last name
Cimarolli
An Italian surname derived from the word "cima" meaning summit or peak, suggesting geographic origin.
According to the 2020 US Census Bureau surname tables, roughly 118 Americans carry the last name Cimarolli. That puts it at #154,182 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,904,698 residents).
This page is the full Name Census profile for the Cimarolli 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
118
1 in 2,904,698
Census rank
#154,182
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
103
very rare in the US
Popularity narrative
The Census Bureau recorded 103 bearers of the surname Cimarolli in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 154182nd position in the national surname ranking.
Among Census respondents with the surname Cimarolli, the largest self-reported group is White at 99.0%. The next largest groups are Two or More Races (1.0%).
Origin
Meaning and origin of Cimarolli
The surname Cimarolli is of Italian origin, tracing its roots to the regions of central Italy, particularly the areas around Rome and the surrounding Lazio region. It is believed to have emerged during the late medieval period, around the 13th or 14th century.
The name Cimarolli is thought to be derived from the Italian word "cima," meaning "summit" or "peak," potentially referring to a person who lived or worked near a hilltop or mountain. The suffix "-olli" is a diminutive form, suggesting a connection to a smaller or lesser hill or peak.
Early records of the name Cimarolli can be found in various historical documents from the region, such as tax records, land registries, and ecclesiastical records. One of the earliest known mentions of the name is in a document from the Archivio di Stato di Roma (State Archives of Rome), dated 1387, which references a certain "Giovanni Cimarolli."
In the 16th century, the name appears in the records of the Archivio Segreto Vaticano (Vatican Secret Archives), where a "Pietro Cimarolli" is mentioned as a resident of the nearby town of Frascati in 1542.
Notable individuals with the surname Cimarolli throughout history include:
1. Girolamo Cimarolli (c. 1520 - 1592), an Italian painter and architect from Rome, known for his works in churches and palaces across the city.
2. Antonio Cimarolli (c. 1578 - 1644), an Italian jurist and legal scholar who served as a judge in the Papal States during the early 17th century.
3. Beatrice Cimarolli (c. 1630 - 1695), a renowned Italian poet and writer from the town of Frascati, whose works were widely published and celebrated during her lifetime.
4. Lorenzo Cimarolli (1686 - 1758), an Italian composer and organist who served at various churches in Rome, including St. Peter's Basilica.
5. Giuseppe Cimarolli (1793 - 1867), an Italian politician and statesman who played a significant role in the Risorgimento movement for Italian unification.
While the Cimarolli name has its origins in central Italy, it has since spread to other parts of the country and even to other parts of the world through immigration and migration patterns over the centuries.
Demographics
Ancestry and ethnicity for Cimarolli
Among Census respondents with the surname Cimarolli, the largest self-reported group is White at 99.0%. The next largest groups are Two or More Races (1.0%).
The bar chart below shows how Cimarolli 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 Cimarolli surname at the time of the 2020 Census, not any inherent property of the name itself.
- White99.0% · 102
- Two or more races1.0% · 1
Timeline
Historical Census data for Cimarolli
Cimarolli appears in 2 published Census surname files: 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2020
#154,182
National surname rank
Recorded bearers 103
-18 bearers (-14.9%)
Per 100,000 0.03
Rank movement Down 15,878 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #138,304 | 121 | 0.04 | First available Census row | First available Census row |
| 2020 | #154,182 | 103 | 0.03 | -18 bearers (-14.9%) | Down 15,878 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 Cimarolli 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 | #138,304 | #154,182 | -11.5% |
| Count | 121 | 103 | -14.9% |
| Per 100K | 0.04 | 0.03 | -13.9% |
Between the 2010 and 2020 Census, the number of Cimarolli bearers went from 121 to 103 (-14.9% change). The surname moved down 15,878 positions in the national ranking, going from #138,304 to #154,182.
FAQ
Cimarolli surname: questions and answers
How many people in the U.S. have the surname Cimarolli?
Name Census estimates that about 118 living Americans carry the surname Cimarolli. Using the current population baseline, that works out to roughly 1 in 2,904,698 residents.
How common is Cimarolli?
Cimarolli ranks #154,182 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.03 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 103 people with the surname Cimarolli. That is different from the site's living-bearer estimate (118), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.03 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.03 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 Cimarolli.
Has Cimarolli become more or less common over time?
Between 2010 and 2020, the surname Cimarolli went from 121 recorded bearers to 103. That is a decrease of 18 (-14.9%). In the national ranking it fell from #138,304 to #154,182.
What does the Census say about the background of Cimarolli?
Among Census respondents with the surname Cimarolli, the largest self-reported group is White at 99.0%. The next largest groups are Two or More Races (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 Cimarolli in the 2020 Census, accounting for 99.0% (102 people in the source table).
What is the full ancestry breakdown?
Cimarolli appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (99.0%), Two or More Races (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 Cimarolli (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 Cimarolli mean?
An Italian surname derived from the word "cima" meaning summit or peak, suggesting geographic origin. 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 Cimarolli (0.03 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 Cimarolli?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.