Mckay is a distinctive girls' name in United States, ranking #6072 in 1997 with 16 recorded births. The name reached its all-time peak in 1999 with 21 births ranking #5147. Since 1996, the popularity has increased by 23.1%. In 1997, approximately 1 in every 108,791 girls born was named Mckay. FALLING Recent data shows the name is currently falling.