There are an estimated 2,781 people named Iain alive worldwide today. That ranks Iain at #5303 globally, with the highest concentrations in United States.
In the United States, Iain is held by approximately 2,781 people, ranking #5303 among first names. That works out to roughly 1 per 100,000 Americans (or 1 in 119,346 U.S. residents).
Historically Iain is used overwhelmingly as a male name (100.0% male).
Iain 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.