Callaghan is a distinctive boys' name in United States, ranking #10808 in 2001 with 5 recorded births. The name reached its all-time peak in 2025 with 41 births ranking #3002. Since 1996, the popularity has decreased by 16.7%. In 2001, approximately 1 in every 388,566 boys born was named Callaghan. STABLE Recent data shows the name is currently stable.