Mckay is a distinctive girls' name in United States, ranking #13482 in 2007 with 8 recorded births. The name reached its all-time peak in 1999 with 21 births ranking #5147. Since 1996, the popularity has decreased by 38.5%. In 2007, approximately 1 in every 240,306 girls born was named Mckay. FALLING Recent data shows the name is currently falling.