Mckay is a distinctive girls' name in United States, ranking #16452 in 2006 with 6 recorded births. The name reached its all-time peak in 1999 with 21 births ranking #5147. Since 1996, the popularity has decreased by 53.8%. In 2006, approximately 1 in every 316,845 girls born was named Mckay. FALLING Recent data shows the name is currently falling.