Mckay is a distinctive girls' name in United States, ranking #10823 in 2021 with 9 recorded births. The name reached its all-time peak in 1999 with 21 births ranking #5147. Since 1996, the popularity has decreased by 30.8%. In 2021, approximately 1 in every 182,190 girls born was named Mckay. FALLING Recent data shows the name is currently falling.