Castle is a distinctive boys' name in United States, ranking #9260 in 2000 with 6 recorded births. This places Castle in the bottom 24% 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 2000, approximately 1 in every 327,322 boys born was named Castle. RISING Recent data shows the name is currently rising.