Mackinley is a distinctive boys' name in United States, ranking #4846 in 1997 with 13 recorded births. The name reached its all-time peak in 1999 with 23 births ranking #3447. Since 1996, the popularity has decreased by 18.8%. In 1997, approximately 1 in every 145,007 boys born was named Mackinley. RISING Recent data shows the name is currently rising.