Jacek is a distinctive boys' name in United States, ranking #12774 in 2025 with 5 recorded births. The name reached its all-time peak in 2013 with 37 births ranking #3019. Since 1996, the popularity has decreased by 37.5%. In 2025, approximately 1 in every 341,615 boys born was named Jacek. STABLE Recent data shows the name is currently stable.