2000
#136,783
National surname rank
Recorded bearers 113
First available Census row
Per 100,000 0.04
Very Rare Last name
Castorino
An Italian surname referring to a beaver or beaver hunter.
According to the 2020 US Census Bureau surname tables, roughly 116 Americans carry the last name Castorino. That puts it at #155,270 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,954,779 residents).
This page is the full Name Census profile for the Castorino 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
116
1 in 2,954,779
Census rank
#155,270
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
101
very rare in the US
Popularity narrative
The Census Bureau recorded 101 bearers of the surname Castorino in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 155270th position in the national surname ranking.
Among Census respondents with the surname Castorino, the largest self-reported group is White at 85.1%. The next largest groups are Hispanic (10.9%) and Asian/Pacific Islander (2.0%).
Origin
Meaning and origin of Castorino
The surname Castorino is of Italian origin, derived from the Latin word "castor", meaning beaver. It is believed to have originated in the regions of Sicily and Calabria in southern Italy during the Middle Ages.
One of the earliest recorded instances of the name Castorino can be found in a document from the 13th century, where a certain Guglielmo Castorino was mentioned as a landowner in the town of Palermo, Sicily. This suggests that the name may have been initially associated with individuals involved in the fur trade or living in areas near beaver habitats.
In the 14th century, the Castorino family was documented as residing in the town of Catanzaro, Calabria. Records from this period indicate that a member of the family, Giovanni Castorino (1325-1392), was a respected scholar and professor at the University of Naples.
As the name spread to other parts of Italy, it underwent slight variations in spelling, such as Castorini, Castorino, and Castorini. One notable figure bearing this name was Giacomo Castorino (1560-1633), a renowned architect from Palermo who was responsible for designing several churches and palaces in the city.
In the 18th century, the Castorino name gained prominence in the region of Abruzzo, where a family of that name was involved in the production of fine textiles and fabrics. Luigi Castorino (1725-1792) was a respected merchant and textile manufacturer in the city of L'Aquila.
During the 19th century, several members of the Castorino family emigrated from Italy to other parts of the world, including the Americas. One such individual was Antonio Castorino (1845-1912), who settled in Argentina and became a successful businessman and landowner in the province of Buenos Aires.
Other notable individuals with the surname Castorino include:
1. Vincenzo Castorino (1870-1947), an Italian painter and sculptor from Palermo, known for his works depicting scenes from Sicilian folklore.
2. Giulia Castorino (1890-1972), an Italian writer and poet from Naples, whose works often explored themes of love and nature.
3. Saverio Castorino (1912-1998), an Italian-American artist and sculptor based in New York City, renowned for his works in bronze and stone.
4. Maria Castorino (1932-2018), an Italian actress and theater director from Rome, who gained recognition for her performances in several Italian films and stage productions.
Demographics
Ancestry and ethnicity for Castorino
Among Census respondents with the surname Castorino, the largest self-reported group is White at 85.1%. The next largest groups are Hispanic (10.9%) and Asian/Pacific Islander (2.0%).
The bar chart below shows how Castorino 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 Castorino surname at the time of the 2020 Census, not any inherent property of the name itself.
- White85.1% · 86
- Hispanic or Latino10.9% · 11
- Asian and Pacific Islander2.0% · 2
- Black or African American1.0% · 1
- American Indian and Alaska Native1.0% · 1
Timeline
Historical Census data for Castorino
Castorino 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
#148,347
National surname rank
Recorded bearers 111
-2 bearers (-1.8%)
Per 100,000 0.04
Rank movement Down 11,564 places
2020
#155,270
National surname rank
Recorded bearers 101
-10 bearers (-9.0%)
Per 100,000 0.03
Rank movement Down 6,923 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #136,783 | 113 | 0.04 | First available Census row | First available Census row |
| 2010 | #148,347 | 111 | 0.04 | -2 bearers (-1.8%) | Down 11,564 places |
| 2020 | #155,270 | 101 | 0.03 | -10 bearers (-9.0%) | Down 6,923 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 Castorino 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 | #148,347 | #155,270 | -4.7% |
| Count | 111 | 101 | -9.0% |
| Per 100K | 0.04 | 0.03 | -15.5% |
Between the 2010 and 2020 Census, the number of Castorino bearers went from 111 to 101 (-9.0% change). The surname moved down 6,923 positions in the national ranking, going from #148,347 to #155,270.
FAQ
Castorino surname: questions and answers
How many people in the U.S. have the surname Castorino?
Name Census estimates that about 116 living Americans carry the surname Castorino. Using the current population baseline, that works out to roughly 1 in 2,954,779 residents.
How common is Castorino?
Castorino ranks #155,270 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 101 people with the surname Castorino. That is different from the site's living-bearer estimate (116), 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 Castorino.
Has Castorino become more or less common over time?
Between 2010 and 2020, the surname Castorino went from 111 recorded bearers to 101. That is a decrease of 10 (-9.0%). In the national ranking it fell from #148,347 to #155,270.
What does the Census say about the background of Castorino?
Among Census respondents with the surname Castorino, the largest self-reported group is White at 85.1%. The next largest groups are Hispanic (10.9%) and Asian/Pacific Islander (2.0%). 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 Castorino in the 2020 Census, accounting for 85.1% (86 people in the source table).
What is the full ancestry breakdown?
Castorino appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (85.1%), Hispanic (10.9%), Asian/Pacific Islander (2.0%). 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 Castorino (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 Castorino mean?
An Italian surname referring to a beaver or beaver hunter. 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 Castorino (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 Americans have the surname Castorino?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.