2000
#22,078
National surname rank
Recorded bearers 1,093
First available Census row
Per 100,000 0.41
Rare Last name
Casco
A surname possibly derived from the Spanish word "casco" meaning helmet or headpiece.
According to the 2020 US Census Bureau surname tables, roughly 2,182 Americans carry the last name Casco. That puts it at #14,921 in the national surname ranking, appearing at a frequency of 0.64 per 100,000 people (about 1 in 157,083 residents).
This page is the full Name Census profile for the Casco 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
2.2K
1 in 157,083
Census rank
#14,921
2020 decennial data
Per 100,000
0.6
Frequency rate
Recorded bearers
1.9K
rare in the US
Popularity narrative
The Census Bureau recorded 1,903 bearers of the surname Casco in its 2020 decennial surname file. At a rate of 0.64 per 100,000 residents, it holds the 14921st position in the national surname ranking.
Among Census respondents with the surname Casco, the largest self-reported group is Hispanic at 86.1%. The next largest groups are White (6.3%) and Asian/Pacific Islander (6.0%).
Origin
Meaning and origin of Casco
The surname Casco has its origins in Spain and dates back to the 12th century. It is believed to have derived from the Spanish word "casco," which means "helmet" or "headgear." The name was likely given to someone who made or sold helmets, or perhaps a soldier who distinguished himself in battle while wearing a helmet.
One of the earliest recorded instances of the name Casco can be found in the Libro de repartimiento de Sevilla, a census-like document from the 13th century listing the names of Christian settlers in the city of Seville after its reconquest from the Moors. The name also appears in various medieval documents from the regions of Aragon and Catalonia.
In the 16th century, a prominent figure with the surname Casco was Juan de Casco, a Spanish conquistador who participated in the conquest of Peru alongside Francisco Pizarro. Another notable individual was Pedro Casco, a 17th-century Spanish naval officer and explorer who led expeditions to the Pacific Northwest of America.
The Casco name has also been associated with several place names in Spain, such as the town of Casco Viejo (meaning "Old Helmet") in the province of Bilbao, and the Casco Antiguo (meaning "Ancient Helmet") district in the city of Valencia. These place names likely derived from the presence of fortifications or defensive structures resembling helmets in those areas.
Other individuals with the Casco surname throughout history include Gregorio Casco (1592-1669), a Spanish painter known for his religious works; María Teresa Casco (1755-1828), a Venezuelan poet and educator; and Tomas Casco (1823-1901), an Argentine military officer who fought in the War of the Triple Alliance.
It is worth noting that the name Casco has also been found in various spellings, such as Cascou, Cascó, and Cascos, reflecting regional variations and orthographic changes over time.
Demographics
Ancestry and ethnicity for Casco
Among Census respondents with the surname Casco, the largest self-reported group is Hispanic at 86.1%. The next largest groups are White (6.3%) and Asian/Pacific Islander (6.0%).
The bar chart below shows how Casco 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 Casco surname at the time of the 2020 Census, not any inherent property of the name itself.
- Hispanic or Latino86.1% · 1,639
- White6.3% · 120
- Asian and Pacific Islander6.0% · 114
- Two or more races1.3% · 24
- Black or African American0.3% · 6
Timeline
Historical Census data for Casco
Casco 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
#19,896
National surname rank
Recorded bearers 1,350
+257 bearers (+23.5%)
Per 100,000 0.46
Rank movement Up 2,182 places
2020
#14,921
National surname rank
Recorded bearers 1,903
+553 bearers (+41.0%)
Per 100,000 0.64
Rank movement Up 4,975 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #22,078 | 1,093 | 0.41 | First available Census row | First available Census row |
| 2010 | #19,896 | 1,350 | 0.46 | +257 bearers (+23.5%) | Up 2,182 places |
| 2020 | #14,921 | 1,903 | 0.64 | +553 bearers (+41.0%) | Up 4,975 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 Casco 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 | #19,896 | #14,921 | 25.0% |
| Count | 1,350 | 1,903 | 41.0% |
| Per 100K | 0.46 | 0.64 | 38.4% |
Between the 2010 and 2020 Census, the number of Casco bearers went from 1,350 to 1,903 (+41.0% change). The surname moved up 4,975 positions in the national ranking, going from #19,896 to #14,921.
FAQ
Casco surname: questions and answers
How many people in the U.S. have the surname Casco?
Name Census estimates that about 2,182 living Americans carry the surname Casco. Using the current population baseline, that works out to roughly 1 in 157,083 residents.
How common is Casco?
Casco ranks #14,921 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 0.64 per 100,000 residents, which is about 1 people out of every 100,000.
How many people with this surname were counted in the Census?
The raw 2020 Census file counted 1,903 people with the surname Casco. That is different from the site's living-bearer estimate (2,182), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.64 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.64 per 100,000 means that if you picked a random group of 100,000 U.S. residents, you would expect about 1 of them to have the surname Casco.
Has Casco become more or less common over time?
Between 2010 and 2020, the surname Casco went from 1,350 recorded bearers to 1,903. That is an increase of 553 (+41.0%). In the national ranking it rose from #19,896 to #14,921.
What does the Census say about the background of Casco?
Among Census respondents with the surname Casco, the largest self-reported group is Hispanic at 86.1%. The next largest groups are White (6.3%) and Asian/Pacific Islander (6.0%). 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?
Hispanic is the largest self-reported group for the surname Casco in the 2020 Census, accounting for 86.1% (1,639 people in the source table).
What is the full ancestry breakdown?
Casco appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Hispanic (86.1%), White (6.3%), Asian/Pacific Islander (6.0%). 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 Casco (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 Casco mean?
A surname possibly derived from the Spanish word "casco" meaning helmet or headpiece. 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 Casco (0.64 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 are called Casco?
You can see how many people have the surname Casco on our sister site HowManyOfMe.org — same data roots, lighter UI.