Casi
Spanish diminutive of Casilda meaning "chaste, pure".
Name Census estimates that about 1,019 living Americans carry the first name Casi. The name is used almost exclusively for girls. The average person named Casi today is around 39 years old, and the year with the single highest number of Casi births was 1989 (56 babies).
This page is the full Name Census profile for Casi. Below you will find a gender breakdown showing how the name splits between male and female registrations, a year-by-year popularity chart stretching back to 1880, decade-level totals, the top US states for this name, its meaning and etymology, and a set of frequently asked questions with data-backed answers.
For a British comparison, Name Census UK has a UK baby-name profile for Casi with official rankings and popularity over time.
People living today
1.0K
~ 1 in 336,363 Americans
Peak year
1989
56 babies that year
Average age
39
years old
2022 SSA rank
#15,763
Tracked since 1962
Census
Casi in the 2020 Census
The 2020 Census recorded 1,067 people with the first name Casi, which placed it at #11,844 in the published first-name tables. This is a snapshot of people who already had the name at the time of the Census.
The SSA sections elsewhere on this page answer a different question: how often parents gave the name to babies over time. The "people living today" figure on this page is different again: it is a current estimate built from SSA birth records and age-based survival rates, so the two numbers are not expected to match exactly.
2020 Census rank
#11,844
National first-name rank
People counted
1.1K
1,067 in the published race/origin table
Per 100,000
0.4
People with this name in 2020
Largest reported group
White
81.3% of people with this name
Demographics
Ancestry and ethnicity for Casi
In the 2020 Census race and Hispanic-origin table, the largest reported group for people named Casi is White at 81.3%. The next largest groups are Hispanic (6.6%) and Black (5.2%). These figures describe the people who had the name in 2020, not any inherent property of the name itself.
The bar chart below shows how people with the first name Casi 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 name, the Bureau suppresses the figure to protect individual privacy, which is why some names show fewer than six slices.
Percentages are shown so the breakdown is easy to read across every published category. Because the 2020 Census first-name file also includes raw headcounts for each group, Name Census can show those alongside the percentages in the legend and hover tooltip.
Keep in mind that these are self-reported numbers. A first name does not determine a person's race or ethnicity, and the distribution you see here reflects the specific population who happened to carry the name Casi at the time of the 2020 Census, not any inherent property of the name itself.
- White81.3% · 867
- Hispanic or Latino6.6% · 70
- Black or African American5.2% · 56
- Two or more races4.3% · 46
- Asian and Pacific Islander1.5% · 16
- American Indian and Alaska Native1.1% · 12
Popularity
Casi: popularity over time
The SSA tracks Casi from the 1960s through to the 2020s, spanning 7 decades of birth certificate data. The biggest single decade for the name was the 1980s, with 444 total registrations. Usage has dropped considerably from its 1980s peak. The most recent decade brought in only a fraction of the registrations that the name once attracted.
Babies born per year
Decades
Casi by decade
The table below breaks the full SSA timeline into ten-year windows. Each row shows how many male and female babies were given the name Casi during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
Geography
Where Casis live
The SSA's state-level files cover 6 states and territories. Texas, Florida, Oklahoma recorded the most babies named Casi, while Utah, Ohio, Georgia recorded the fewest. The average across all reporting states is about 18 registrations each.
Origin
Meaning and history of Casi
The name Casi has its origins in the ancient Roman culture, dating back to the early centuries of the Roman Empire. It is derived from the Latin word "castus," which means pure or chaste. The name was initially used as a virtue name, bestowed upon children to symbolize purity and moral integrity.
During the Roman era, the name Casi was relatively uncommon, but it gained prominence in the later years of the empire. One of the earliest recorded instances of the name can be found in the writings of the Roman historian Tacitus, who mentioned a nobleman named Cassius in his annals.
In the Middle Ages, the name Casi saw a resurgence in popularity among the Christian communities of Europe. It was often given to individuals who dedicated their lives to the Church or lived a life of piety and virtue. Several notable figures bore this name during this time, including Casi di Narni, an Italian monk and scholar who lived in the 12th century.
As the Renaissance period dawned, the name Casi continued to hold significance, particularly in Italy. One of the most famous bearers of this name was Casi Buonarroti, the nephew of the renowned artist Michelangelo Buonarroti. Casi Buonarroti was born in 1516 and served as a prominent figure in the Florentine Republic.
In the 17th century, the name Casi gained popularity in Spain, where it was sometimes spelled as "Casio." One notable figure from this era was Casio de Montealegre, a Spanish soldier and explorer who participated in the conquest of Chile in the late 1500s.
Moving forward to the 18th century, the name Casi found its way to the American colonies. One of the earliest recorded instances of the name in the United States was Casi Winslow, a prominent merchant and landowner from Massachusetts, born in 1712.
Throughout history, the name Casi has been associated with various individuals from diverse backgrounds, including scholars, artists, and military figures. While it may not be as common today as it once was, the name remains a testament to the enduring influence of ancient Roman culture and the virtues it sought to uphold.
People
Casi + last name combinations
How many people share a full name with Casi as the first name? Click a combination below to see the estimate, or search any pairing.
Related
Other names starting with C
Other first names starting with C with a similar number of bearers.
FAQ
Casi: questions and answers
How many people in the U.S. are named Casi?
Name Census puts the figure at roughly 1,019 living Americans. We arrive at this by taking every SSA birth registration for Casi going back to 1880 and adjusting each cohort for expected survival using CDC actuarial life tables. The result is an age-weighted living-bearer count, not a raw birth total. That works out to about 1 in 336,363 US residents.
Is Casi a common name?
We classify Casi as "Rare". It ranks above 90.2% of all first names in the SSA dataset by living bearers. Across the full history of the data, 1,080 babies have been registered with this name.
When was Casi most popular?
The single biggest year for Casi was 1989, when 56 babies received the name. The fact that the average living Casi is about 39 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
How common was Casi in the 2020 Census?
The published 2020 Census first-name tables recorded 1,067 people with the name Casi, or 0.35 per 100,000 residents. That placed it at #11,844 in the national Census ranking for first names.
Why is the Census count different from the living estimate?
Because they measure different things. The Census figure is a count of people who had the name Casi in 2020. The living estimate aims to answer a current question instead: how many people with the name are alive today, based on SSA birth records and age-based survival rates. Since one number is a 2020 snapshot and the other is a present-day estimate, they are not expected to be identical.
What does the Census say about the gender split for Casi?
In the 2020 Census sex table, Casi leans strongly female. 1,030 people counted with this name were female (96.7%), compared with 35 male bearers (3.3%). The Census view is a snapshot of people living with the name in 2020, while the SSA section above tracks births across time.
What does the Census say about the background of people named Casi?
In the 2020 Census race and Hispanic-origin table, the largest reported group for people named Casi is White at 81.3%. The next largest groups are Hispanic (6.6%) and Black (5.2%). These figures describe the people who had the name in 2020, not any inherent property of the name itself. The percentages in the chart above come from self-reported race and Hispanic-origin responses in the 2020 Census.
Which group reports the name Casi most often in the Census?
White is the largest reported group for people named Casi in the 2020 Census, accounting for 81.3% (867 people in the published table).
Why can the Census sex total and race total differ slightly?
The Census Bureau published separate 2020 tables for sex and for race/Hispanic origin, and the released figures can differ slightly because of privacy protection in the public files. That is why this page treats the gender section and the race/origin section as two related snapshots instead of forcing them into one identical total.
Does every first name have Census demographic data?
No. The public Census first-name release only includes names that met the Bureau's publication rules, so many rarer names in the SSA files have no Census demographic snapshot. When that happens, the SSA trend, gender history, and state sections still appear, but the 2020 Census demographic sections are omitted.
What does the SSA popularity chart show?
The chart tracks births, not the number of people alive with the name today. Each point shows how many babies were given the name Casi in that year. That makes it useful for spotting when the name rose, peaked, or faded.
Is Casi a female name?
Yes, 100.0% of people registered as Casi in the SSA data are female. You can see the full per-sex comparison in the gender distribution section above, which includes the latest year rank, birth count, and peak year for each sex.
Is Casi still being used today?
Yes. The SSA still recorded Casi in 2024, and the page above shows its latest-year rank where available. A name can be well past its peak and still remain in steady use, especially if it built up a large population over earlier decades.
Why can a name have a lot of living bearers even if it is not trendy now?
Because living-bearer counts and current baby-name popularity measure different things. A name like Casi can build up a very large population over many decades, even if fewer parents are choosing it now than they did at its peak.
Where does this data come from?
First-name figures come from the Social Security Administration's national baby name files, which cover every name on a birth certificate from 1880 to 2024. Living-bearer estimates layer in CDC actuarial life tables broken out by sex to account for mortality. The population baseline (342,754,338) is the Census Bureau's latest national estimate. You can read the full calculation on our methodology page.
How many Americans are named Casi?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.