Castiel is a distinctive boys' name in United States, ranking #1009 in 2025 with 224 recorded births. This places Castiel in the top 7% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2019 with 336 births ranking #724. In 2025, approximately 1 in every 7,625 boys born was named Castiel. STABLE Recent data shows the name is currently stable.