Mackinley is a distinctive girls' name in United States, ranking #5976 in 2001 with 19 recorded births. The name reached its all-time peak in 2018 with 28 births ranking #4843. Since 1996, the popularity has increased by 171.4%. In 2001, approximately 1 in every 94,766 girls born was named Mackinley. FALLING Recent data shows the name is currently falling.