Jo is a distinctive girls' name in United States, ranking #4028 in 2025 with 36 recorded births. The name reached its all-time peak in 1997 with 58 births ranking #2317. Since 1996, the popularity has decreased by 18.2%. In 2025, approximately 1 in every 44,646 girls born was named Jo. FALLING Recent data shows the name is currently falling.