Callaghan is a distinctive boys' name in United States, ranking #7654 in 2017 with 10 recorded births. The name reached its all-time peak in 2025 with 41 births ranking #3002. Since 1996, the popularity has increased by 66.7%. In 2017, approximately 1 in every 185,032 boys born was named Callaghan. STABLE Recent data shows the name is currently stable.