Mackinley is a distinctive girls' name in United States, ranking #6079 in 2021 with 20 recorded births. The name reached its all-time peak in 2018 with 28 births ranking #4843. Since 1996, the popularity has increased by 185.7%. In 2021, approximately 1 in every 81,986 girls born was named Mackinley. FALLING Recent data shows the name is currently falling.