Mckinley is a distinctive girls' name in United States, ranking #556 in 2010 with 526 recorded births. The name reached its all-time peak in 2014 with 862 births ranking #379. Since 1996, the popularity has increased by 484.4%. In 2010, approximately 1 in every 3,379 girls born was named Mckinley. FALLING Recent data shows the name is currently falling.