Jacek is a distinctive boys' name in United States, ranking #7913 in 1998 with 7 recorded births. The name reached its all-time peak in 2013 with 37 births ranking #3019. Since 1996, the popularity has decreased by 12.5%. In 1998, approximately 1 in every 273,045 boys born was named Jacek. STABLE Recent data shows the name is currently stable.