Theo is a popular boys' name in United States, ranking #82 in 2025 with 3,945 recorded births. The name reached its all-time peak in 2023 with 4,137 births ranking #78. Since 1996, the popularity has increased by 7,343.4%. In 2025, approximately 1 in every 433 boys born was named Theo. STABLE Recent data shows the name is currently stable.