Mckinley is a distinctive girls' name in United States, ranking #1319 in 1999 with 137 recorded births. The name reached its all-time peak in 2014 with 862 births ranking #379. Since 1996, the popularity has increased by 52.2%. In 1999, approximately 1 in every 12,947 girls born was named Mckinley. FALLING Recent data shows the name is currently falling.