Ally is a distinctive girls' name in United States, ranking #872 in 2015 with 319 recorded births. The name reached its all-time peak in 1998 with 636 births ranking #417. Since 1996, the popularity has increased by 303.8%. In 2015, approximately 1 in every 5,595 girls born was named Ally. FALLING Recent data shows the name is currently falling.