Sonja is a distinctive girls' name in United States, ranking #3966 in 2025 with 37 recorded births. The name reached its all-time peak in 1998 with 159 births ranking #1179. Since 1996, the popularity has decreased by 73.8%. In 2025, approximately 1 in every 43,440 girls born was named Sonja. FALLING Recent data shows the name is currently falling.