Mackinley is a distinctive boys' name in United States, ranking #8740 in 2009 with 9 recorded births. This places Mackinley in the bottom 40% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1999 with 23 births ranking #3447. Since 1996, the popularity has decreased by 43.8%. In 2009, approximately 1 in every 220,367 boys born was named Mackinley. RISING Recent data shows the name is currently rising.