How Common is the First Name Theo?
We estimate that there are 33,245 people named Theo who are currently alive and were born in the United States. Theo is the 550th most common for men, and the 1,195th most common overall.
How Old are People Named Theo?
The average person named Theo is 8.79 years old.
Is Theo a Popular Baby Name Right Now?
3,966 people named Theo were born in the U.S. in 2025. It was the 82nd most popular name for boys, and the 144th most popular overall.
The popularity of Theo peaked in 2023, when it was the 78th most popular name for baby boys.
Is Theo a Boy's Name or a Girl's Name?
Theo is mostly a male name, but there are some women named Theo. 97.6% of people named Theo are male, while 2.4% are female.
Facts About the Name Theo
Popularity of Theo in England
In 2020, Theo was the 17th most popular name for boys in England and Wales.