Callaghan is a distinctive boys' name in United States, ranking #4262 in 2021 with 24 recorded births. The name reached its all-time peak in 2025 with 41 births ranking #3002. Since 1996, the popularity has increased by 300.0%. In 2021, approximately 1 in every 72,843 boys born was named Callaghan. STABLE Recent data shows the name is currently stable.