Trend of the Popularity of Theo as a Male Baby Name in Illinois
Updated on December 6, 2025.
Data Source: Social Security Administration (SSA).
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In 2024, there were 152 male babies that were named Theo in Illinois, which was 0.30% of the total number of male babies born in Illinois in 2024. Between 1989 and 2024, the name Theo peaked as a male baby name in Illinois in 2023 with a count of 176 babies, which was 0.35% of the total male babies born in Illinois in 2023.
The first chart below show the trend of the number of male babies in Illinois that were named Theo, and the second chart shows the percent of male babies in Illinois that were named Theo.
Trend of the Number of Male Babies who were Named Theo in Illinois
Trend of the Percentage of Male Babies who were Named Theo in Illinois
The table below below shows the trend of the number of male babies and the percentage of male babies born in Illinois who were named Theo from 1989 to 2024.
Trend of the Popularity of Theo as a Male Baby Name in Illinois
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| Year | Number of Male Babies | Percent of Total Male Babies (%) |
|---|---|---|
| 1989 | 5 | 0.01 |
| 1991 | 5 | 0.01 |
| 1992 | 7 | 0.01 |
| 1998 | 6 | 0.01 |
| 2004 | 5 | 0.01 |
| 2006 | 5 | 0.01 |
| 2007 | 7 | 0.01 |
| 2008 | 7 | 0.01 |
| 2010 | 5 | 0.01 |
| 2011 | 16 | 0.02 |
| 2012 | 13 | 0.02 |
| 2013 | 17 | 0.03 |
| 2014 | 29 | 0.04 |
| 2015 | 37 | 0.06 |
| 2016 | 58 | 0.09 |
| 2017 | 66 | 0.11 |
| 2018 | 95 | 0.16 |
| 2019 | 80 | 0.14 |
| 2020 | 101 | 0.19 |
| 2021 | 131 | 0.24 |
| 2022 | 140 | 0.27 |
| 2023 | 176 | 0.35 |
| 2024 | 152 | 0.30 |