Castle is a distinctive boys' name in United States, ranking #5827 in 2016 with 15 recorded births. This places Castle in the top 41% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2018 with 32 births ranking #3460. In 2016, approximately 1 in every 126,481 boys born was named Castle. RISING Recent data shows the name is currently rising.