Mckinley is a moderately popular girls' name in United States, ranking #450 in 2011 with 675 recorded births. The name reached its all-time peak in 2014 with 862 births ranking #379. Since 1996, the popularity has increased by 650.0%. In 2011, approximately 1 in every 2,606 girls born was named Mckinley. FALLING Recent data shows the name is currently falling.