Mackinley is a distinctive girls' name in United States, ranking #8141 in 2010 with 15 recorded births. The name reached its all-time peak in 2018 with 28 births ranking #4843. Since 1996, the popularity has increased by 114.3%. In 2010, approximately 1 in every 118,488 girls born was named Mackinley. FALLING Recent data shows the name is currently falling.