Mackinley is a distinctive girls' name in United States, ranking #8839 in 2003 with 12 recorded births. The name reached its all-time peak in 2018 with 28 births ranking #4843. Since 1996, the popularity has increased by 71.4%. In 2003, approximately 1 in every 152,254 girls born was named Mackinley. FALLING Recent data shows the name is currently falling.