Boys name · Illinois
Leo in Illinois
Leo was the 8th most popular boys name in Illinois in 2025, with 385 babies named Leo that year. Since 1910, Illinois families have named 13,398 babies Leo.
Popularity over time
Leo in Illinois, year by year
| Year | Babies | State rank |
|---|---|---|
| 1910 | 63 | 30th |
| 1926 | 239 | 49th |
| 1943 | 76 | 132nd |
| 1959 | 90 | 176th |
| 1976 | 27 | 324th |
| 1992 | 31 | 368th |
| 2009 | 87 | 174th |
| 2025 | 385 | 8th |
Its rank among boys names in Illinois climbed from 30th in 1910 to 8th in 2025.
The most babies named Leo in Illinois in a single year was 385, in 2025. Its best showing was 8th among boys names in 2025.
Across the country, Leo reached its best rank of 3rd in District of Columbia (2023). See Leo in every state →
How popular is Leo in Illinois?
Leo was the 8th most popular boys name in Illinois in 2025, with 385 babies named Leo that year. Since 1910, Illinois families have named 13,398 babies Leo.
How many babies are named Leo in Illinois?
In 2025, 385 babies were named Leo in Illinois. The most babies named Leo in Illinois in a single year was 385, in 2025.
What is the rank of Leo in Illinois?
Leo ranked 8th among boys names in Illinois in 2025. Its best showing was 8th among boys names 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.