Mckay is a distinctive girls' name in United States, ranking #8955 in 2000 with 11 recorded births. The name reached its all-time peak in 1999 with 21 births ranking #5147. Since 1996, the popularity has decreased by 15.4%. In 2000, approximately 1 in every 165,088 girls born was named Mckay. FALLING Recent data shows the name is currently falling.