Katja is a distinctive girls' name in United States, ranking #3912 in 2003 with 35 recorded births. The name reached its all-time peak in 1998 with 48 births ranking #2785. Since 1996, the popularity has increased by 105.9%. In 2003, approximately 1 in every 52,201 girls born was named Katja. FALLING Recent data shows the name is currently falling.