Recorded 1980–2016 Girls' name Peak 2001 346 births

Casidy — girls' name

346 babies named Casidy in U.S. Social Security records since 1980, with the highest year being 2001. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.

1980s341990s1162000s1452010s51
2000s
Peak decade

42% of everyone ever named Casidy was born in this single decade.

2001
Single peak year

26 babies were named Casidy in 2001 — its busiest year on record.

What the Data Says About Casidy

The Social Security Administration has registered 346 babies named Casidy between 1980 and 2016, spanning 37 consecutive years of U.S. birth records. As a girl's name, Casidy currently falls outside the top 1,000 girls' names for 2016. The name reached its historical peak in 2001, when 26 babies received it in a single year.

Decade-level aggregation shows that Casidy performed strongest in the 2000s, accumulating 145 births during that ten-year window. Across the 4 decades of recorded activity, Casidy shows notable generational variation in parental adoption.

No etymological entry is currently available for Casidy in our reference dataset. These figures derive from SSA's annual national and state-level name files, which include any name appearing at least five times in a given year or state-year; names below that threshold are suppressed for privacy and therefore excluded from the totals shown here. The 346 total represents a lower bound — actual usage may be higher in years or states where the count fell below the disclosure floor. This page is provided for informational and research purposes only and does not constitute personal, legal, or naming advice.

Casidy at a glance

Last recorded 2016

Total births

346

Since 1980

37 years of records

Peak year

2001

26 births that year

Strongest decade: 2000s

Current rank

Unranked

Outside the modern top-1,000

As of 2016

Active since

1980

Recorded for 37 years

Last year on file: 2016

Casidy popularity over time

Annual U.S. births registered with the Social Security Administration · 2016–1980

Last recorded 2016
Peak year (2001)
26
Annual births at peak — across 37 years of records
051015202530 201620112007200319991995199019851980 5

Casidy by decade

Total births in each ten-year window — peak vs trough at a glance

Peak: 2000s
Peak decade
2000s
145 births that decade — 42% of Casidy's all-time total
1980s341990s1162000s1452010s51

Frequently Asked Questions

How popular is the name Casidy?
346 babies have been named Casidy since 1980. It was last recorded in 2016. The peak year was 2001 with 26 births.
When was Casidy most popular?
Casidy was most popular in the 2000s decade with 145 total births. The single peak year was 2001.
How long has the name Casidy been used?
Casidy has been recorded in Social Security data since 1980, spanning 37 years of data through 2016.
What names are similar to Casidy?
Names with a similar sound or spelling include Cassandra, Casey, Cassidy, Cassie, and 4 more. These share a common prefix and are also used for girls.

Data Sources

Data as of 2024. Source: U.S. Social Security Administration (SSA).

Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications — National Data, 1980–2016 (ssa.gov/oact/babynames). National-level data includes all names with 5 or more occurrences in a given year.

State-level: Source: U.S. Social Security Administration, Baby Names — State-Level Files (namesbystate.zip). Includes all names with 5 or more occurrences per state per year; rarer names are excluded for privacy.