Katja is a distinctive girls' name in United States, ranking #7528 in 2019 with 15 recorded births. The name reached its all-time peak in 1998 with 48 births ranking #2785. Since 1996, the popularity has decreased by 11.8%. In 2019, approximately 1 in every 111,838 girls born was named Katja. FALLING Recent data shows the name is currently falling.