Mackinley is a distinctive girls' name in United States, ranking #6985 in 2017 with 17 recorded births. The name reached its all-time peak in 2018 with 28 births ranking #4843. Since 1996, the popularity has increased by 142.9%. In 2017, approximately 1 in every 101,522 girls born was named Mackinley. FALLING Recent data shows the name is currently falling.