Mackinley is a distinctive girls' name in United States, ranking #10552 in 2007 with 11 recorded births. The name reached its all-time peak in 2018 with 28 births ranking #4843. Since 1996, the popularity has increased by 57.1%. In 2007, approximately 1 in every 174,768 girls born was named Mackinley. FALLING Recent data shows the name is currently falling.