Mackay is a distinctive boys' name in United States, ranking #6525 in 2012 with 13 recorded births. This places Mackay in the top 46% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2012 with 13 births ranking #6525. Since 1996, the popularity has increased by 62.5%. In 2012, approximately 1 in every 145,894 boys born was named Mackay. FALLING Recent data shows the name is currently falling.