Mckinley is a moderately popular girls' name in United States, ranking #379 in 2014 with 862 recorded births. The name reached its all-time peak in 2014 with 862 births ranking #379. Since 1996, the popularity has increased by 857.8%. In 2014, approximately 1 in every 2,072 girls born was named Mckinley. FALLING Recent data shows the name is currently falling.