Krystal is a moderately popular girls' name in United States, ranking #329 in 1999 with 929 recorded births. The name reached its all-time peak in 1996 with 1,336 births ranking #217. Since 1996, the popularity has decreased by 30.5%. In 1999, approximately 1 in every 1,909 girls born was named Krystal. FALLING Recent data shows the name is currently falling.