Isiah is a distinctive boys' name in United States, ranking #639 in 2011 with 366 recorded births. This places Isiah in the top 4% of ranked US boys' names for the year. Its actual usage is classified as Uncommon. The name reached its all-time peak in 2001 with 822 births ranking #336. Since 1996, the popularity has decreased by 44.4%. In 2011, approximately 1 in every 5,188 boys born was named Isiah. STABLE Recent data shows the name is currently stable.