Mckay is a distinctive girls' name in United States, ranking #12694 in 2014 with 8 recorded births. The name reached its all-time peak in 1999 with 21 births ranking #5147. Since 1996, the popularity has decreased by 38.5%. In 2014, approximately 1 in every 223,242 girls born was named Mckay. FALLING Recent data shows the name is currently falling.