Cassidie
A feminine name of Celtic origin meaning "curly-haired".
Name Census estimates that about 453 living Americans carry the first name Cassidie. The name is used almost exclusively for girls. The average person named Cassidie today is around 25 years old, and the year with the single highest number of Cassidie births was 1998 (31 babies).
This page is the full Name Census profile for Cassidie. 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 Cassidie with official rankings and popularity over time.
People living today
453
~ 1 in 756,632 Americans
Peak year
1998
31 babies that year
Average age
25
years old
2017 SSA rank
#11,868
Tracked since 1981
Census
Cassidie in the 2020 Census
The 2020 Census recorded 423 people with the first name Cassidie, which placed it at #23,223 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
#23,223
National first-name rank
People counted
423
423 in the published race/origin table
Per 100,000
0.1
People with this name in 2020
Largest reported group
White
73.5% of people with this name
Demographics
Ancestry and ethnicity for Cassidie
In the 2020 Census race and Hispanic-origin table, the largest reported group for people named Cassidie is White at 73.5%. The next largest groups are Two or More Races (8.7%) and Hispanic (8.5%). 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 Cassidie 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 Cassidie at the time of the 2020 Census, not any inherent property of the name itself.
- White73.5% · 311
- Two or more races8.7% · 37
- Hispanic or Latino8.5% · 36
- Black or African American6.6% · 28
- Asian and Pacific Islander1.7% · 7
- American Indian and Alaska Native0.9% · 4
Popularity
Cassidie: popularity over time
The SSA tracks Cassidie from the 1980s through to the 2010s, spanning 4 decades of birth certificate data. The biggest single decade for the name was the 2000s, with 186 total registrations. Although the numbers have come down from the 2000s peak, Cassidie remains solidly in use and shows no sign of disappearing from maternity wards.
Babies born per year
Decades
Cassidie 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 Cassidie during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
Geography
Where Cassidies live
Origin
Meaning and history of Cassidie
The name Cassidie is believed to have originated as a feminine form of the ancient Roman name Cassidius. Cassidius was derived from the Latin word "cassida," which referred to a type of helmet or head covering worn by soldiers in ancient times. The name Cassidius likely indicated strength, protection, or a connection to the military.
In the early centuries of the Roman Empire, the name Cassidius was occasionally bestowed upon male children, though it was not a particularly common name. Records from this period are scarce, but there are mentions of individuals with the name Cassidius in various inscriptions and official documents.
As the Roman Empire expanded and its influence spread, the name Cassidius began to appear in other regions, sometimes with slight variations in spelling or pronunciation. In parts of Gaul (modern-day France), for example, the name may have been rendered as Cassidie or Cassidié.
One of the earliest known individuals to bear a variation of this name was Cassidie of Carthage, a Christian martyr who lived in the 3rd century AD. According to historical accounts, Cassidie was a young woman who refused to renounce her faith during the persecution of Christians under the Roman Emperor Valerian. She was executed for her beliefs, and her story became a source of inspiration for early Christians.
In the Middle Ages, the name Cassidie gained some popularity among certain noble families in parts of Europe. Notable examples include Cassidie de Montfort (c. 1145-1198), a noblewoman from France who was involved in the Third Crusade, and Cassidie of Brabant (c. 1215-1273), a Countess of Holland and Zeeland.
During the Renaissance period, the name Cassidie appeared occasionally in various literary works and historical records. One notable figure was Cassidie Borgia (1499-1519), an Italian noblewoman and daughter of the infamous Lucrezia Borgia. Cassidie Borgia was known for her beauty and intelligence, and she was involved in various political intrigues of the time.
In the 17th and 18th centuries, the name Cassidie remained relatively uncommon, but it did appear in some historical records and literary works. For example, Cassidie de la Baume (1618-1689) was a French noblewoman and author who wrote a memoir detailing her experiences during the Fronde, a series of civil wars in France.
Overall, while not a widely popular name throughout history, Cassidie and its variations have been present in various cultures and time periods, often associated with nobility, strength, and resilience. Its origins in the ancient Roman name Cassidius have given it a sense of historical significance and a connection to the military heritage of the Roman Empire.
People
Cassidie + last name combinations
How many people share a full name with Cassidie 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
Cassidie: questions and answers
How many people in the U.S. are named Cassidie?
Name Census puts the figure at roughly 453 living Americans. We arrive at this by taking every SSA birth registration for Cassidie 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 756,632 US residents.
Is Cassidie a common name?
We classify Cassidie as "Very Rare". It ranks above 83.6% of all first names in the SSA dataset by living bearers. Across the full history of the data, 464 babies have been registered with this name.
When was Cassidie most popular?
The single biggest year for Cassidie was 1998, when 31 babies received the name. The fact that the average living Cassidie is about 25 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
How common was Cassidie in the 2020 Census?
The published 2020 Census first-name tables recorded 423 people with the name Cassidie, or 0.14 per 100,000 residents. That placed it at #23,223 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 Cassidie 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 Cassidie?
In the 2020 Census sex table, Cassidie appears almost entirely female. Of the 426 people counted with this name, 99.5% were female and only a very small share were male. 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 Cassidie?
In the 2020 Census race and Hispanic-origin table, the largest reported group for people named Cassidie is White at 73.5%. The next largest groups are Two or More Races (8.7%) and Hispanic (8.5%). 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 Cassidie most often in the Census?
White is the largest reported group for people named Cassidie in the 2020 Census, accounting for 73.5% (311 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 Cassidie in that year. That makes it useful for spotting when the name rose, peaked, or faded.
Is Cassidie a female name?
Yes, 100.0% of people registered as Cassidie 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 Cassidie still being used today?
Yes. The SSA still recorded Cassidie 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 Cassidie 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 common is the name Cassidie?
For a quick modern take, check how many Americans are named Cassidie on our sister site HowManyOfMe.org.