Mckay is a distinctive girls' name in United States, ranking #13615 in 2017 with 7 recorded births. This places Mckay in the bottom 26% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1999 with 21 births ranking #5147. Since 1996, the popularity has decreased by 46.2%. In 2017, approximately 1 in every 246,554 girls born was named Mckay. FALLING Recent data shows the name is currently falling.