2000
#139,757
National surname rank
Recorded bearers 110
First available Census row
Per 100,000 0.04
Very Rare Last name
Casario
Italian occupational surname meaning "innkeeper" or referring to one who worked at an inn.
According to the 2020 US Census Bureau surname tables, roughly 124 Americans carry the last name Casario. That puts it at #150,935 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,764,148 residents).
This page is the full Name Census profile for the Casario 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
124
1 in 2,764,148
Census rank
#150,935
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
108
very rare in the US
Popularity narrative
The Census Bureau recorded 108 bearers of the surname Casario in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 150935th position in the national surname ranking.
Among Census respondents with the surname Casario, the largest self-reported group is White at 86.1%. The next largest groups are Hispanic (9.3%) and Two or More Races (3.7%).
Origin
Meaning and origin of Casario
The surname Casario has its roots in Italy, specifically in the regions of Lombardy and Tuscany, where it first emerged in the late medieval period. The name is believed to derive from the Italian word "casaro," which means "cheese-maker" or "dairy farmer." This occupation-based surname likely originated as a way to identify individuals by their trade or profession.
One of the earliest recorded instances of the name Casario can be found in a document from the late 13th century, which mentions a certain Pietro Casario, a cheesemaker residing in the town of Bergamo, Lombardy. This document serves as evidence that the name was already in use by that time and was closely tied to the dairy industry.
In the 14th century, the Casario family gained prominence in the city of Siena, Tuscany. Historical records mention a Giovanni Casario, a wealthy merchant and landowner who played a significant role in the city's economic and political affairs during that period.
The name Casario also appears in several ancient manuscripts and records from various regions of Italy. For instance, in a 15th-century document from the Archivio di Stato di Firenze (State Archives of Florence), a certain Bartolomeo Casario is listed as a landowner in the Tuscan countryside.
Throughout the centuries, several notable individuals have carried the surname Casario. One such figure was Girolamo Casario (1495-1566), a renowned Italian humanist, scholar, and poet who hailed from the city of Verona. His works, including poetry and literary critiques, were widely celebrated during the Renaissance period.
Another prominent bearer of the name was Ludovico Casario (1572-1629), a celebrated architect from Milan. He was responsible for designing several churches and palaces in the city, including the Church of San Fedele and the Palazzo Litta.
In the 18th century, Giuseppe Casario (1715-1788) gained recognition as a skilled engraver and printmaker from Venice. His intricate etchings and engravings, depicting scenes from Italian cities and landscapes, were highly sought after by art collectors of the time.
During the 19th century, Antonio Casario (1818-1892), a lawyer and politician from Naples, made his mark by advocating for the unification of Italy and serving as a member of the Italian Parliament after the country's unification in 1861.
The Casario surname has also been associated with various places and localities throughout Italy. For instance, the town of Casario in the province of Salerno, Campania, likely derived its name from the presence of families bearing this surname in the area.
Demographics
Ancestry and ethnicity for Casario
Among Census respondents with the surname Casario, the largest self-reported group is White at 86.1%. The next largest groups are Hispanic (9.3%) and Two or More Races (3.7%).
The bar chart below shows how Casario 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 Casario surname at the time of the 2020 Census, not any inherent property of the name itself.
- White86.1% · 93
- Hispanic or Latino9.3% · 10
- Two or more races3.7% · 4
- American Indian and Alaska Native0.9% · 1
Timeline
Historical Census data for Casario
Casario 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
#139,228
National surname rank
Recorded bearers 120
+10 bearers (+9.1%)
Per 100,000 0.04
Rank movement Up 529 places
2020
#150,935
National surname rank
Recorded bearers 108
-12 bearers (-10.0%)
Per 100,000 0.04
Rank movement Down 11,707 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #139,757 | 110 | 0.04 | First available Census row | First available Census row |
| 2010 | #139,228 | 120 | 0.04 | +10 bearers (+9.1%) | Up 529 places |
| 2020 | #150,935 | 108 | 0.04 | -12 bearers (-10.0%) | Down 11,707 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 Casario 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 | #139,228 | #150,935 | -8.4% |
| Count | 120 | 108 | -10.0% |
| Per 100K | 0.04 | 0.04 | -9.7% |
Between the 2010 and 2020 Census, the number of Casario bearers went from 120 to 108 (-10.0% change). The surname moved down 11,707 positions in the national ranking, going from #139,228 to #150,935.
FAQ
Casario surname: questions and answers
How many people in the U.S. have the surname Casario?
Name Census estimates that about 124 living Americans carry the surname Casario. Using the current population baseline, that works out to roughly 1 in 2,764,148 residents.
How common is Casario?
Casario ranks #150,935 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.04 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 108 people with the surname Casario. That is different from the site's living-bearer estimate (124), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.04 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.04 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 Casario.
Has Casario become more or less common over time?
Between 2010 and 2020, the surname Casario went from 120 recorded bearers to 108. That is a decrease of 12 (-10.0%). In the national ranking it fell from #139,228 to #150,935.
What does the Census say about the background of Casario?
Among Census respondents with the surname Casario, the largest self-reported group is White at 86.1%. The next largest groups are Hispanic (9.3%) and Two or More Races (3.7%). 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 Casario in the 2020 Census, accounting for 86.1% (93 people in the source table).
What is the full ancestry breakdown?
Casario appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (86.1%), Hispanic (9.3%), Two or More Races (3.7%). 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 Casario (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 Casario mean?
Italian occupational surname meaning "innkeeper" or referring to one who worked at an inn. 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 Casario (0.04 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 Casario?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.