2010
#156,044
National surname rank
Recorded bearers 104
First available Census row
Per 100,000 0.04
Very Rare Last name
Casul
A surname referring to a person from the town of Casul or similar place name.
According to the 2020 US Census Bureau surname tables, roughly 135 Americans carry the last name Casul. That puts it at #143,511 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,538,921 residents).
This page is the full Name Census profile for the Casul 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
135
1 in 2,538,921
Census rank
#143,511
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
118
very rare in the US
Popularity narrative
The Census Bureau recorded 118 bearers of the surname Casul in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 143511th position in the national surname ranking.
Among Census respondents with the surname Casul, the largest self-reported group is Hispanic at 82.2%. The next largest groups are White (10.2%) and Black (4.2%).
Origin
Meaning and origin of Casul
The surname CASUL has its origins in the Iberian peninsula, specifically in the regions of modern-day Spain and Portugal. It is believed to have emerged during the medieval period, around the 12th or 13th century. The name CASUL is thought to be derived from the Latin word "casula," which referred to a small house or dwelling.
One of the earliest recorded mentions of the surname CASUL can be found in the Catalan historical records from the 13th century. These records document a certain Guillem CASUL, who was a landowner in the region of Valencia. The name also appears in Portuguese documents from the same period, with variations such as CASUL and CAZUL.
In the 14th century, the CASUL surname is mentioned in the records of the Monastery of Santa Maria de Alcobaça in Portugal. These records document a certain Afonso CASUL, who was a prominent figure in the local community and a benefactor of the monastery.
During the 15th century, the surname CASUL gained prominence in the region of Andalusia, Spain. One notable figure was Juan CASUL, a merchant and landowner who lived in the city of Seville in the late 15th century. His descendants continued to be influential in the region for several generations.
Another notable individual with the CASUL surname was Rodrigo CASUL, a Spanish explorer and navigator who participated in the expeditions of Christopher Columbus to the Americas in the late 15th century. He is believed to have been born in the city of Cádiz, Spain, around 1460.
In the 16th century, the CASUL surname appears in the records of the Spanish Inquisition. A certain Diego CASUL, born in Toledo in the early 1500s, was prosecuted by the Inquisition on charges of heresy. However, the details of his case and ultimate fate are not well documented.
Over the centuries, the CASUL surname has spread to various parts of the world, carried by individuals and families who migrated from the Iberian peninsula. However, its origins and earliest records can be traced back to the medieval period in Spain and Portugal, where it was likely derived from the Latin word "casula," signifying a small dwelling or house.
Demographics
Ancestry and ethnicity for Casul
Among Census respondents with the surname Casul, the largest self-reported group is Hispanic at 82.2%. The next largest groups are White (10.2%) and Black (4.2%).
The bar chart below shows how Casul 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 Casul surname at the time of the 2020 Census, not any inherent property of the name itself.
- Hispanic or Latino82.2% · 97
- White10.2% · 12
- Black or African American4.2% · 5
- Asian and Pacific Islander3.4% · 4
Timeline
Historical Census data for Casul
Casul 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
#143,511
National surname rank
Recorded bearers 118
+14 bearers (+13.5%)
Per 100,000 0.04
Rank movement Up 12,533 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #156,044 | 104 | 0.04 | First available Census row | First available Census row |
| 2020 | #143,511 | 118 | 0.04 | +14 bearers (+13.5%) | Up 12,533 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 Casul 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 | #156,044 | #143,511 | 8.0% |
| Count | 104 | 118 | 13.5% |
| Per 100K | 0.04 | 0.04 | -1.3% |
Between the 2010 and 2020 Census, the number of Casul bearers went from 104 to 118 (+13.5% change). The surname moved up 12,533 positions in the national ranking, going from #156,044 to #143,511.
FAQ
Casul surname: questions and answers
How many people in the U.S. have the surname Casul?
Name Census estimates that about 135 living Americans carry the surname Casul. Using the current population baseline, that works out to roughly 1 in 2,538,921 residents.
How common is Casul?
Casul ranks #143,511 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 118 people with the surname Casul. That is different from the site's living-bearer estimate (135), 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 Casul.
Has Casul become more or less common over time?
Between 2010 and 2020, the surname Casul went from 104 recorded bearers to 118. That is an increase of 14 (+13.5%). In the national ranking it rose from #156,044 to #143,511.
What does the Census say about the background of Casul?
Among Census respondents with the surname Casul, the largest self-reported group is Hispanic at 82.2%. The next largest groups are White (10.2%) and Black (4.2%). 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?
Hispanic is the largest self-reported group for the surname Casul in the 2020 Census, accounting for 82.2% (97 people in the source table).
What is the full ancestry breakdown?
Casul appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Hispanic (82.2%), White (10.2%), Black (4.2%). 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 Casul (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 Casul mean?
A surname referring to a person from the town of Casul or similar place name. 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 Casul (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 Casul?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.