Mackinley is a distinctive girls' name in United States, ranking #5819 in 2012 with 23 recorded births. The name reached its all-time peak in 2018 with 28 births ranking #4843. Since 1996, the popularity has increased by 228.6%. In 2012, approximately 1 in every 76,554 girls born was named Mackinley. FALLING Recent data shows the name is currently falling.