Callaghan is a distinctive boys' name in United States, ranking #3284 in 2022 with 36 recorded births. The name reached its all-time peak in 2025 with 41 births ranking #3002. Since 1996, the popularity has increased by 500.0%. In 2022, approximately 1 in every 48,455 boys born was named Callaghan. STABLE Recent data shows the name is currently stable.