Calahan is a distinctive boys' name in United States, ranking #4879 in 2020 with 19 recorded births. The name reached its all-time peak in 2025 with 26 births ranking #4063. Since 1996, the popularity has increased by 111.1%. In 2020, approximately 1 in every 90,793 boys born was named Calahan. RISING Recent data shows the name is currently rising.