Recorded 1896–1991 Boys' name Peak 1918 1,104 births

Irby — boys' name

1,104 babies named Irby in U.S. Social Security records since 1896, with the highest year being 1918. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.

1890s61900s201910s1931920s2561930s2161940s1521950s1401960s731970s381980s51990s5
1920s
Peak decade

23% of everyone ever named Irby was born in this single decade.

1918
Single peak year

37 babies were named Irby in 1918 — its busiest year on record.

What the Data Says About Irby

The Social Security Administration has registered 1,104 babies named Irby between 1896 and 1991, spanning 96 consecutive years of U.S. birth records. As a boy's name, Irby currently falls outside the top 1,000 boys' names for 1991. The name reached its historical peak in 1918, when 37 babies received it in a single year.

Decade-level aggregation shows that Irby performed strongest in the 1920s, accumulating 256 births during that ten-year window. Across the 11 decades of recorded activity, Irby shows a clear decline from its mid-century high. Geographically, the name is most concentrated in Alabama, which accounts for 122 births — the largest state-level total in the dataset — followed by Louisiana and Texas. In total, SSA state-level files list Irby in 5 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Irby 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 1,104 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.

Irby at a glance

Last recorded 1991

Total births

1,104

Since 1896

96 years of records

Peak year

1918

37 births that year

Strongest decade: 1920s

Current rank

Unranked

Outside the modern top-1,000

As of 1991

Active since

1896

Recorded for 96 years

Last year on file: 1991

Irby popularity over time — boys

Annual U.S. births registered with the Social Security Administration · 1991–1896

Last recorded 1991
Peak year (1918)
37
Annual births at peak — across 96 years of records
010203040 199119681959195019411932192319141896 6

Irby popularity over time — girls

26 total births recorded since 1898 (Irby as girls' name)

Unisex variant — 26 births
4.555.566.5 19431927192019161898 5

Irby by decade

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

Peak: 1920s
Peak decade
1920s
256 births that decade — 23% of Irby's all-time total
1890s61900s201910s1931920s2561930s2161940s1521950s1401960s731970s381980s51990s5

Irby by state

Where Irby concentrates geographically — total births since 1896

Geographically diffuse
Top 5 states by recorded births for the name Irby
Rank State Visual share Births Share of total
#1 Alabama
122 11.1%
#2 Louisiana
66 6.0%
#3 Texas
16 1.4%
#4 Tennessee
11 1.0%
#5 South Carolina
10 0.9%
Alabama share of Irby's total US births 11.1%
Even split

122 of 1,104 births nationwide. Compared to a flat distribution across 5 reporting states.

Frequently Asked Questions

How popular is the name Irby?
1,104 babies have been named Irby since 1896. It was last recorded in 1991. The peak year was 1918 with 37 births.
When was Irby most popular?
Irby was most popular in the 1920s decade with 256 total births. The single peak year was 1918.
Where is Irby most popular?
The top states for the name Irby are Alabama (122 births), Louisiana (66 births), Texas (16 births).
How long has the name Irby been used?
Irby has been recorded in Social Security data since 1896, spanning 96 years of data through 1991.
What names are similar to Irby?
Names with a similar sound or spelling include Irbin. These share a common prefix and are also used for boys.

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, 1896–1991 (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.