Isiah is a distinctive boys' name in United States, ranking #1480 in 2025 with 120 recorded births. The name reached its all-time peak in 2001 with 822 births ranking #336. Since 1996, the popularity has decreased by 81.8%. In 2025, approximately 1 in every 14,234 boys born was named Isiah. STABLE Recent data shows the name is currently stable.