There are an estimated 284 people named Calahan alive worldwide today. That ranks Calahan at #22510 globally, with the highest concentrations in United States.
In the United States, Calahan is held by approximately 284 people, ranking #22510 among first names. That works out to roughly 0 per 100,000 Americans (or 1 in 1,168,662 U.S. residents).
Historically Calahan is used overwhelmingly as a male name (100.0% male).
Calahan appears in birth records going back to 1880. Use the chart below to see how its popularity has changed across decades, and the surname section to find common pairings.