Total births
11
Unisex name · since 1918
Illinois
Illinois has 11 recorded births since 1918 in federal Social Security data, most heavily in 1920 -- full year-by-year trend, decade aggregates, and state rankings follow.
- 11
- total births
- 1918–1920
- years on record
- 1920s
- peak decade
- 55%
- born in that decade
Illinois is not among the current top-ranked girls names; 11 have been recorded since 1918.
Illinois has 11 recorded births among girls since 1918, per the U.S. Social Security Administration, though it falls outside today's most-used girls names, busiest in the 1920s -- see the year-by-year trends, decade totals, and state-level distribution below, all drawn directly from SSA birth-registration files spanning 1918 to 1920.
- 11 total births
- 1918–1920 years on record
- 1920s peak decade
- 55% born in that decade
Data updated Jul 2026
The verdict
11 girls have been named Illinois since 1918, peaking in the 1920s, last recorded in 1920.
- 11
- total births
- 1918–1920
- years on record
- 1920s
- peak decade
- 55%
- born in that decade
1920s
Peak decade
55% of everyone ever named Illinois was born in this single decade.
1920
Single peak year
6 babies were named Illinois in 1920 - its busiest year on record.
Illinois's usage pattern, beyond the headline number
Splitting Illinois's full recorded timeline at 1920, 55% of its total births fall in the more recent half of the record versus 45% in the earlier half -- a fairly even split across the full record. Its quietest year on record was 1918, with just 5 recorded births -- worth weighing against the 1920 peak of 6 to see the full range of the name's swing in popularity.
Illinois at a glance
Last recorded 1920Peak year
1920
Current rank
Unranked
Active since
1918
Illinois popularity over time - girls
Annual U.S. births registered with the Social Security Administration · 1918–1920
- Peak year (1920)
- 6
- Annual births at peak, across 3 years of records
Illinois popularity over time - boys
5 total births recorded since 1923 (Illinois as boys' name)
Illinois by decade
Total births in each ten-year window, peak vs trough at a glance
1920s was Illinois's strongest decade.
6 babies received the name during that ten-year window, about 55% of all-time use.
Illinois births by decade
Total births in each ten-year window
- 1910s
1910s
5 births
- 1920s
1920s
6 births
What this shows Peak: 1920s at 6 births (55% of all-time use).
Frequently Asked Questions
How popular is the name Illinois? ▼
Since 1918, Social Security records show 11 babies named Illinois. The most recent recorded year was 1920. Its busiest year on record was 1920, with 6 births.
When was Illinois most popular? ▼
Illinois was most popular in the 1920s decade with 6 total births. The single peak year was 1920.
Is Illinois a unisex name? ▼
Yes, Illinois is used for both boys and girls. As a girl's name it has 11 births, and as a boy's name it has 5 births.
How long has the name Illinois been used? ▼
The SSA has tracked Illinois since 1918 -- 3 years through the most recent 1920 data.
What names are similar to Illinois? ▼
Names with a similar sound or spelling include Illiana, Illa, Illyana, Illianna, and 4 more. These share a common prefix and are also used for girls.
Keep exploring Illinois
Nearby Names Like Illinois
Names with a similar sound, spelling, or feel to Illinois
Illiana Girl
#2310 2,095 births
Illa Girl
#11158 1,800 births
Illyana Girl
#5084 706 births
Illianna Girl
#7792 478 births
Illeana Girl
#13639 384 births
Compare Illinois side by side: Illinois vs Illiana Illinois vs Illa Illinois vs Illyana
Related Names
Names with a similar number of total births
Data Sources
Data as of July 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, 1918–1920 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Illinois: Baby Name Since 1918 - 11 Births, Peak 1920." NameAlmanac. Accessed via https://namealmanac.com/name/illinois. 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 Illinois 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 July 2026.