Callaghan is a distinctive boys' name in United States, ranking #3002 in 2025 with 41 recorded births. The name reached its all-time peak in 2025 with 41 births ranking #3002. Since 1996, the popularity has increased by 583.3%. In 2025, approximately 1 in every 41,660 boys born was named Callaghan. STABLE Recent data shows the name is currently stable.