Mckinley is a moderately popular girls' name in United States, ranking #379 in 2015 with 860 recorded births. The name reached its all-time peak in 2014 with 862 births ranking #379. Since 1996, the popularity has increased by 855.6%. In 2015, approximately 1 in every 2,075 girls born was named Mckinley. FALLING Recent data shows the name is currently falling.