Boys name · Illinois
Leo in Illinois
In SSA data for Illinois, 13,398 babies are named Leo across years with 5 or more births, starting in 1910. In the latest year, 2025, it ranked as the #8 most popular boys name, with 385 born.
Popularity over time
Leo in Illinois, year by year
| Year | Babies | State rank |
|---|---|---|
| 1910 | 63 | #30 |
| 1926 | 239 | #49 |
| 1943 | 76 | #132 |
| 1959 | 90 | #176 |
| 1976 | 27 | #324 |
| 1992 | 31 | #368 |
| 2009 | 87 | #174 |
| 2025 | 385 | #8 |
No year in Illinois had more Leo births than 2025, when 385 were born. Leo's highest rank in Illinois was #8, set in 2025.
Its rank among boys names in Illinois ran from #8 in 2025 to #517 in 1988, starting at #30 in 1910 and ending at #8 in 2025.
Nationally, Leo's strongest state was the District of Columbia, where it hit #3 in 2023. See Leo in every state →
How popular is Leo in Illinois?
In SSA data for Illinois, 13,398 babies are named Leo across years with 5 or more births, starting in 1910. In the latest year, 2025, it ranked as the #8 most popular boys name, with 385 born.
How many babies are named Leo in Illinois?
Illinois recorded 385 births of babies named Leo in 2025.
What is the rank of Leo in Illinois?
Leo ranked #8 among boys names in Illinois in 2025.
Source: U.S. Social Security Administration, names by state of birth (public domain). Counts below 5 in a state-year are omitted by the SSA for privacy.