Shaun Cassidy
There are approximately 6 people named Shaun Cassidy living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 57,125,723 Americans.
This estimate combines SSA birth records for the first name Shaun 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
6
1 in 57,125,723
Named Shaun
69K
Alive today
Named Cassidy
31K
Alive today
US population
343M
Denominator
Estimated living: 69K
Rarity: Uncommon
Gender: Male
Peak year: 1978
Average age: 41
Estimated bearers: 31K
Rarity: Uncommon
Census rank: #1,325
Per 100K: 9.01
Top ancestry: White (92.6%)
First name trend
Shaun: popularity over time
Year-by-year SSA birth registrations for the first name Shaun. The peak year was 1978 with 6,221 births. The average person named Shaun today is 41 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 Shaun has a living-bearer frequency of 0.0202% of the US population, based on 69,150 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 6 people with the full name Shaun 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 Shaun
Related
Other people with the surname Cassidy
FAQ
Shaun Cassidy: questions and answers
How many people are named Shaun Cassidy?
We estimate approximately 6 people in the United States share the full name Shaun Cassidy. That works out to about 1 in 57,125,723 Americans. This is calculated by combining the first-name frequency (0.0202%) with the surname frequency (9.01 per 100K) against the current US population.
How rare is the name Shaun Cassidy?
We classify Shaun Cassidy as "Very Rare". About 1 in 57,125,723 Americans share this exact first and last name combination.
Is Shaun a male or female name?
Shaun is predominantly male. Out of 73,527 total SSA registrations, 95.7% were male and 4.3% were female. See the full Shaun 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.