Katja is a distinctive girls' name in United States, ranking #6203 in 2007 with 22 recorded births. The name reached its all-time peak in 1998 with 48 births ranking #2785. Since 1996, the popularity has increased by 29.4%. In 2007, approximately 1 in every 87,384 girls born was named Katja. FALLING Recent data shows the name is currently falling.