Mckay is a distinctive girls' name in United States, ranking #6587 in 2002 with 17 recorded births. The name reached its all-time peak in 1999 with 21 births ranking #5147. Since 1996, the popularity has increased by 30.8%. In 2002, approximately 1 in every 105,695 girls born was named Mckay. FALLING Recent data shows the name is currently falling.