Katja is a distinctive girls' name in United States, ranking #5695 in 2001 with 20 recorded births. The name reached its all-time peak in 1998 with 48 births ranking #2785. Since 1996, the popularity has increased by 17.6%. In 2001, approximately 1 in every 90,028 girls born was named Katja. FALLING Recent data shows the name is currently falling.