Total births
60,848
Unisex name · since 1969
Cassidy
60,848 babies named Cassidy in U.S. Social Security records since 1969, with the highest year being 1999. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.
- #478
- among girls today
- 60,848
- born since 1969
- 2000s
- peak decade
- 97%
- more common than other girls
60,848 babies have been named Cassidy since 1969, making it today's #478 unisex name.
Social Security Administration records show Cassidy recorded 60,848 times among girls since 1969, holding rank #478 nationally today, ahead of 97% of girls, peaking in the 2000s. This profile derives year-by-year birth trends, decade totals, and state-level distribution directly from SSA birth-registration files spanning 1969 to 2025.
- #478 among girls today
- 60,848 born since 1969
- 2000s peak decade
- 97% more common than other girls
Data updated Jun 2026
The verdict
Cassidy is currently the #478 unisex name in America, more common than 97% of girls - 60,848 born since 1969, peaking in the 2000s.
- #478
- among girls today
- 60,848
- born since 1969
- 2000s
- peak decade
- 97%
- more common than other girls
Cassidy vs. every other girls name in current SSA rankings
#478
of 17,726 girls in use
More common than 97% of names given to girls today.
2000s
Peak decade
35% of everyone ever named Cassidy was born in this single decade.
1999
Single peak year
3,395 babies were named Cassidy in 1999 - its busiest year on record.
How Cassidy compares
60,848 Top 3% higher than 97% of 17,726 names currently given to girls
Based on all-time total births among currently-ranked girls names. Names with fewer occurrences are grouped into wider buckets on the right.
Source U.S. Social Security Administration, national baby name data
How the numbers stack up
Cassidy's all-time total is 159x the median girls name, and Olivia still leads by a wide margin.
| Metric | Cassidy | Median girls name (Emerly) | #1 girls name (Olivia) |
|---|---|---|---|
| All-time total births | 60,848 | 382 | 567,345 |
| Peak-year births | 3,395 | 48 | 19,840 |
Cassidy's usage pattern, beyond the headline number
Splitting Cassidy's full recorded timeline at 1997, 75% of its total births fall in the more recent half of the record versus 25% in the earlier half -- usage has skewed toward the present, not a one-decade spike. Its quietest year on record was 1969, with just 5 recorded births -- worth weighing against the 1999 peak of 3,395 to see the full range of the name's swing in popularity.
Cassidy at a glance
Top 1,000 girls' namePeak year
1999
Current rank
#478
Active since
1969
Cassidy popularity over time - girls
Annual U.S. births registered with the Social Security Administration · 1969–2025
- Peak year (1999)
- 3,395
- Annual births at peak, across 57 years of records
Cassidy popularity over time - boys
3,735 total births recorded since 1968 (Cassidy as boys' name)
Cassidy by decade
Total births in each ten-year window, peak vs trough at a glance
2000s was Cassidy's strongest decade.
21,180 babies received the name during that ten-year window, about 35% of all-time use.
Cassidy births by decade
Total births in each ten-year window
- 1960s 5
1960s
5 births
- 1970s 523
1970s
523 births
- 1980s 3,341
1980s
3,341 births
- 1990s
1990s
20,659 births
- 2000s
2000s
21,180 births
- 2010s
2010s
11,235 births
- 2020s 3,905
2020s
3,905 births
What this shows Peak: 2000s at 21,180 births (35% of all-time use).
How Cassidy compares to similarly-sized names
Years in SSA records vs. share of all-time use concentrated in the single peak year, among 15 girls names closest to Cassidy's total volume
Cassidy vs 15 similarly-sized girls names
Cassidy by state
Where Cassidy concentrates geographically, total births since 1969
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | California | | 6,258 | 10.3% |
| #2 | Texas | | 4,238 | 7.0% |
| #3 | Pennsylvania | | 3,064 | 5.0% |
| #4 | New York | | 3,057 | 5.0% |
| #5 | Florida | | 2,975 | 4.9% |
| #6 | Ohio | | 2,654 | 4.4% |
| #7 | Illinois | | 2,242 | 3.7% |
| #8 | Michigan | | 2,164 | 3.6% |
California share of Cassidy's total US births 10.3%
Even split
6,258 of 60,848 births nationwide. Compared to a flat distribution across 51 reporting states.
Cassidy appears in 51 states. Explore state details →
Frequently Asked Questions
How popular is the name Cassidy? ▼
Since 1969, Social Security records show 60,848 babies named Cassidy. Today it holds rank #478 among girls. Its busiest year on record was 1999, with 3,395 births.
When was Cassidy most popular? ▼
Cassidy was most popular in the 2000s decade with 21,180 total births. The single peak year was 1999.
Where is Cassidy most popular? ▼
The top states for the name Cassidy are California (6,258 births), Texas (4,238 births), Pennsylvania (3,064 births).
Is Cassidy a unisex name? ▼
Yes, Cassidy is used for both boys and girls. As a girl's name it has 60,848 births, and as a boy's name it has 3,735 births.
How long has the name Cassidy been used? ▼
Records for Cassidy go back to 1969, giving 57 years of history through 2025.
What names are similar to Cassidy? ▼
Names with a similar sound or spelling include Cassandra, Casey, Cassie, Casandra, and 4 more. These share a common prefix and are also used for girls.
What to do with Cassidy's data
- Cassidy's decade-level peak was the 2000s (21,180 total births); usage has since declined to 3,905 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- California records the most Cassidys (6,258 births) -- see the full state breakdown if geography matters to your decision. California names
- Weighing it against an alternative? Put two names side by side. Compare names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Cassidy
Nearby Names Like Cassidy
Names with a similar sound, spelling, or feel to Cassidy
Cassandra Girl
#615 171,008 births
Casey Girl
#1054 78,100 births
Cassie Girl
#1270 46,642 births
Casandra Girl
#8506 15,784 births
Casie Girl
#12387 4,800 births
Compare Cassidy side by side: Cassidy vs Cassandra Cassidy vs Casey Cassidy vs Cassie
Related Names
Names with a similar popularity rank to Cassidy
Romina #477
7,247 births · Peak 2024
Skye #479
24,262 births · Peak 2014
Heaven #476
30,361 births · Peak 2006
Elle #480
19,247 births · Peak 2019
Murphy #475
4,688 births · Peak 2025
Destiny #481
151,763 births · Peak 2000
Clementine #474
13,676 births · Peak 2025
Lyra #482
8,095 births · Peak 2025
Data Sources
Data as of June 2026. Source: U.S. Social Security Administration (SSA).
According to the Social Security Administration, this profile draws directly from the agency's public-use baby-name files (updated June 2026). See our methodology for the full extraction, aggregation, and privacy-suppression rules.
Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications, National Data, 1969–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Cassidy: #478 Unisex Name - 60,848 Births, Peak 1999." NameAlmanac. Accessed via https://namealmanac.com/name/cassidy. Licensed CC BY-SA 4.0.
Name Almanac is rendered directly from the Social Security Administration's public baby-name files, no number is typed in by an editor. This profile for Cassidy draws directly on SSA national and state-level files, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.