Mckay is a distinctive girls' name in United States, ranking #17310 in 2018 with 5 recorded births. The name reached its all-time peak in 1999 with 21 births ranking #5147. Since 1996, the popularity has decreased by 61.5%. In 2018, approximately 1 in every 340,085 girls born was named Mckay. FALLING Recent data shows the name is currently falling.