How Many People Are Named Cassidy?
An estimated 62,566 people in the United States have the first name Cassidy. It is predominantly female (94.2%). The average bearer is 24 years old, and Cassidy peaked in popularity in 1999 with 3,449 births that year.
Below you will find a full statistical profile of Cassidy as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Cassidy paired with any surname.
Estimated Living Americans
62,566
About 1 in 5,478 people in the U.S.
Rarity
Uncommon
Predicted Gender
Female
94.2% confidence
Average Age
24
years old
Peak Year
1999
3,449 births
Total Registered
63,963
since 1880
Gender Distribution for Cassidy
Cassidy is predominantly female (94.2%), though 3,684 male births have been registered. It functions as a unisex name for a small percentage of bearers.
Cassidy as a male name
Ranked #2,308 in 2024
61 male births in 2024
Peak: 1984 (169 births)
Cassidy as a female name
Ranked #476 in 2024
646 female births in 2024
Peak: 1999 (3,395 births)
Cassidy: Popularity Over Time
SSA records for Cassidy span from the 1960s to the 2020s, covering 7 decades of naming data. The most popular decade for this name was the 2000s, when 21,658 babies were registered. Cassidy has declined significantly from its peak in the 2000s. Recent registrations are a fraction of what they were at the name's height.
Cassidy by Decade
How has Cassidy tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Cassidy by State
Birth registrations for Cassidy span all 51 states and territories in the SSA database. The highest counts are in California, Texas, New York. The lowest are in District of Columbia, Wyoming, Vermont. On average, about 1,177 Cassidys were registered per state.
Cassidy + Last Name Combinations
How many people share a full name with Cassidy as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Cassidy
Other first names starting with C with a similar number of bearers.
Cassidy: Questions and Answers
How many people in the U.S. are named Cassidy?
We estimate approximately 62,566 people named Cassidy are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 5,478 Americans share this first name.
Is Cassidy a common name?
Cassidy is classified as "Uncommon" and is more popular than 99.3% of all first names in the SSA database. A total of 63,963 births have been registered with this name since 1880.
When was Cassidy most popular?
Cassidy reached peak popularity in 1999, when 3,449 babies were given this name. The average age of a living person named Cassidy is approximately 24 years old, reflecting when the name was most commonly given.
Is Cassidy a female name?
Cassidy is predominantly female. 94.2% of people with this name are female. See the gender breakdown above for full details.
How many Cassidy Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Cassidy Smith, Cassidy Johnson, Cassidy Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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