Josiah is a popular boys' name in United States, ranking #54 in 2025 with 5,509 recorded births. The name reached its all-time peak in 2017 with 7,073 births ranking #51. Since 1996, the popularity has increased by 343.6%. In 2025, approximately 1 in every 310 boys born was named Josiah. STABLE Recent data shows the name is currently stable.