Mackinley is a distinctive boys' name in United States, ranking #3447 in 1999 with 23 recorded births. The name reached its all-time peak in 1999 with 23 births ranking #3447. Since 1996, the popularity has increased by 43.8%. In 1999, approximately 1 in every 83,482 boys born was named Mackinley. RISING Recent data shows the name is currently rising.