US rank #3881 Girls' name Peak 1942 98,583 births

Kay — #3881 US girls' name

98,583 babies named Kay in U.S. Social Security records since 1885, with the highest year being 1942. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.

1880s311890s1221900s4521910s21731920s26651930s173011940s326541950s246451960s123881970s25181980s14091990s8692000s6352010s5042020s217
#3881
of 17,661 girls in use

More common than 78% of names given to girls today.

1940s
Peak decade

33% of everyone ever named Kay was born in this single decade.

1942
Single peak year

3,623 babies were named Kay in 1942 — its busiest year on record.

What the Data Says About Kay

The Social Security Administration has registered 98,583 babies named Kay between 1885 and 2024, spanning 140 consecutive years of U.S. birth records. As a girl's name, Kay currently holds the #3881 rank among girls for 2024. The name reached its historical peak in 1942, when 3,623 babies received it in a single year.

Decade-level aggregation shows that Kay performed strongest in the 1940s, accumulating 32,654 births during that ten-year window. Across the 15 decades of recorded activity, Kay shows a clear decline from its mid-century high. Geographically, the name is most concentrated in Texas, which accounts for 6,866 births — the largest state-level total in the dataset — followed by Michigan and Ohio. In total, SSA state-level files list Kay in 51 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Kay 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 98,583 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.

Kay at a glance

Outside the top 1,000

Total births

98,583

Since 1885

140 years of records

Peak year

1942

3,623 births that year

Strongest decade: 1940s

Current rank

#3,881

Among girls

As of 2024

Active since

1885

Recorded for 140 years

Last year on file: 2024

Kay popularity over time — girls

Annual U.S. births registered with the Social Security Administration · 2024–1885

Outside the top 1,000
Peak year (1942)
3,623
Annual births at peak — across 140 years of records
-1,00001,0002,0003,0004,000 202420061988197019521934191618981885 6

Kay popularity over time — boys

3,914 total births recorded since 1882 (Kay as boys' name)

Unisex variant — 3,914 births
-50050100150200 202419981981196619521938192419101882 5

Kay by decade

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

Peak: 1940s
Peak decade
1940s
32,654 births that decade — 33% of Kay's all-time total
1880s311890s1221900s4521910s21731920s26651930s173011940s326541950s246451960s123881970s25181980s14091990s8692000s6352010s5042020s217

Kay by state

Where Kay concentrates geographically — total births since 1885

Geographically diffuse
Top 8 states by recorded births for the name Kay
Rank State Visual share Births Share of total
#1 Texas
6,866 7.0%
#2 Michigan
6,448 6.5%
#3 Ohio
6,213 6.3%
#4 Pennsylvania
5,808 5.9%
#5 Illinois
5,637 5.7%
#6 California
4,969 5.0%
#7 Wisconsin
4,950 5.0%
#8 Minnesota
3,507 3.6%
Texas share of Kay's total US births 7.0%
Even split

6,866 of 98,583 births nationwide. Compared to a flat distribution across 51 reporting states.

Kay appears in 51 states. Explore state details →

Frequently Asked Questions

How popular is the name Kay?
98,583 babies have been named Kay since 1885. It currently ranks #3881 among girls. The peak year was 1942 with 3,623 births.
When was Kay most popular?
Kay was most popular in the 1940s decade with 32,654 total births. The single peak year was 1942.
Where is Kay most popular?
The top states for the name Kay are Texas (6,866 births), Michigan (6,448 births), Ohio (6,213 births).
How long has the name Kay been used?
Kay has been recorded in Social Security data since 1885, spanning 140 years of data through 2024.
What names are similar to Kay?
Names with a similar sound or spelling include Kayla, Kaylee, Kayleigh, Kaylie, and 4 more. These share a common prefix and are also used for girls.

Keep exploring Kay

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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, 1885–2024 (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.