Callaghan is a distinctive boys' name in United States, ranking #4988 in 2019 with 19 recorded births. The name reached its all-time peak in 2025 with 41 births ranking #3002. Since 1996, the popularity has increased by 216.7%. In 2019, approximately 1 in every 94,387 boys born was named Callaghan. STABLE Recent data shows the name is currently stable.