Boys name · Illinois
Theodore in Illinois
In SSA data for Illinois, 17,801 babies are named Theodore across years with 5 or more births, starting in 1910. In the latest year, 2025, it ranked as the #4 most popular boys name, with 537 born.
Popularity over time
Theodore in Illinois, year by year
| Year | Babies | State rank |
|---|---|---|
| 1910 | 38 | #49 |
| 1926 | 247 | #45 |
| 1943 | 149 | #82 |
| 1959 | 147 | #133 |
| 1976 | 96 | #135 |
| 1992 | 59 | #241 |
| 2009 | 63 | #229 |
| 2025 | 537 | #4 |
Its busiest year in Illinois was 2025, with 537 Theodore births. Its highest rank in Illinois came in 2023, at #4.
Theodore started at #49 in 1910 and finished at #4 in 2025 on the boys list in Illinois, with a high of #4 in 2023 and a low of #294 in 2002.
Michigan gave Theodore its highest national rank, #1, in 2025. See Theodore in every state →
How popular is Theodore in Illinois?
In SSA data for Illinois, 17,801 babies are named Theodore across years with 5 or more births, starting in 1910. In the latest year, 2025, it ranked as the #4 most popular boys name, with 537 born.
How many babies are named Theodore in Illinois?
Illinois recorded 537 births of babies named Theodore in 2025.
What is the rank of Theodore in Illinois?
Theodore ranked #4 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.