Katja is a distinctive girls' name in United States, ranking #5180 in 2005 with 25 recorded births. The name reached its all-time peak in 1998 with 48 births ranking #2785. Since 1996, the popularity has increased by 47.1%. In 2005, approximately 1 in every 73,908 girls born was named Katja. FALLING Recent data shows the name is currently falling.