Isiah is a distinctive boys' name in United States, ranking #535 in 2009 with 497 recorded births. The name reached its all-time peak in 2001 with 822 births ranking #336. Since 1996, the popularity has decreased by 24.5%. In 2009, approximately 1 in every 3,991 boys born was named Isiah. STABLE Recent data shows the name is currently stable.