Joanna Cassidy
There are approximately 8 people named Joanna Cassidy living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 42,844,292 Americans.
This estimate combines SSA birth records for the first name Joanna with Census Bureau frequency data for the surname Cassidy. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Expected bearers
8
1 in 42,844,292
Named Joanna
94K
Alive today
Named Cassidy
31K
Alive today
US population
343M
Denominator
Estimated living: 94K
Rarity: Uncommon
Gender: Female
Peak year: 1984
Average age: 37
Estimated bearers: 31K
Rarity: Uncommon
Census rank: #1,325
Per 100K: 9.01
Top ancestry: White (92.6%)
First name trend
Joanna: popularity over time
Year-by-year SSA birth registrations for the first name Joanna. The peak year was 1984 with 3,353 births. The average person named Joanna today is 37 years old.
Babies born per year
Ethnicity
Ancestry of the Cassidy surname
Self-reported race and ethnicity breakdown for people with the surname Cassidy, from the 2010 US Census Bureau. The largest group is White at 92.6%.
- White92.6%
- Hispanic or Latino2.7%
- Black or African American2.2%
- Two or more races1.4%
- Asian and Pacific Islander0.7%
- American Indian and Alaska Native0.4%
Methodology
How we calculated this
The first name Joanna has a living-bearer frequency of 0.0274% of the US population, based on 94,050 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
The surname Cassidy appears at a rate of 9.01 per 100,000 residents in the 2010 Census Bureau surname file, which translates to a frequency of 0.0090%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 8 people with the full name Joanna Cassidy. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Joanna
Related
Other people with the surname Cassidy
FAQ
Joanna Cassidy: questions and answers
How many people are named Joanna Cassidy?
We estimate approximately 8 people in the United States share the full name Joanna Cassidy. That works out to about 1 in 42,844,292 Americans. This is calculated by combining the first-name frequency (0.0274%) with the surname frequency (9.01 per 100K) against the current US population.
How rare is the name Joanna Cassidy?
We classify Joanna Cassidy as "Very Rare". About 1 in 42,844,292 Americans share this exact first and last name combination.
Is Joanna a male or female name?
Joanna is predominantly female. Out of 111,062 total SSA registrations, 0.3% were male and 99.7% were female. See the full Joanna profile for detailed gender data.
Where does this data come from?
First-name data comes from the Social Security Administration's national baby name files (1880 to 2024). Surname data comes from the 2010 US Census Bureau decennial surname tables. Living-bearer estimates use CDC actuarial life tables to adjust for mortality. Read the full methodology.