How Many People Are Named Cassidy?
people named Cassidy are alive in the United States today (estimate)
About 1 in 5,369 people in the US has this name
Based on 64,583 babies named Cassidy in Social Security records from 1968 to 2025, and the share of each birth year still alive in 2025.
Popularity Rank
💎 Rare
Peak Year
3,449 births
Trend
Stable (last 10 years)
📖 Name Origin & Meaning
Meaning:
From an Irish surname which was derived from Ó Caiside meaning "descendant of CAISIDE".
Source of the meaning, origin, pronunciation and related names: Behind the Name.
⚧ Gender Distribution
Of the babies given the name Cassidy, 94.4% were girls and 5.6% were boys. The share of girls among babies named Cassidy rose from 59.8% in the 1970s to 92.8% in the 2020s.
👥 Age Distribution
The average person named Cassidy alive today is about 22 years old, and 78% are under 30. Half of them were between 16 and 29 in 2025.
📈 Popularity Over Time
Cassidy first appears in the records in 1968 and was given most often in 1999, to 3,449 babies. In 2025, 609 babies got the name.
Babies given the name each year, 1968 to 2025
🏆 Rank History
Cassidy never made the top 10 girls' names. Its best rank was #99, in 1999, and it was in the top 100 in 1999. In 2025 it ranked #541.
| Girls | |
|---|---|
| Rank in 2025 | #541 |
| Best rank | #99 (1999) |
| Years in the top 100 | 1 (1999 to 1999) |
| Rank in its biggest decade | #164 in the 2000s |
📍 State-Wise Distribution
People named Cassidy alive today, by the state where they were born (estimate; state records start in 1910).
More people named Cassidy were born in California than in any other state: about 6,616 of those alive today. Compared with the national rate in the same years, Cassidy was given 2.3 times as often in Montana, 2.2 times in Maine and 1.8 times in Utah.
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